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Pigments, Biological (17):
Recent article
Pigments, Biological
Abstract
Procedures to isolate native light-harvesting chlorophyll-a/b complex (LHCIIb) and to reconstitute recombinant LHCIIb are described. Separation of trimeric from monomeric forms and free pigment by sucrose density-gradient ultracentrifugation can be applied to both native and reconstituted complexes....
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PMID: 20960126
PDF is available here.
PDF is available here.
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Abstract
The cytochrome b6f complex from the filamentous cyanobacteria (Mastigocladus laminosus, Nostoc sp. PCC 7120) and spinach chloroplasts has been purified as a homo-dimer. Electrospray ionization mass spectroscopy showed the monomer to contain eight and nine subunits, respectively, and dimeric masses o...
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PMID: 20960122
PDF is available here.
PDF is available here.
Bioresource Technology (101)23 2010
Abstract
The prospects of utilizing pretreated seawater for the culture of Arthrospira (Spirulina) platensis was evaluated under laboratory conditions with three seawater media and a control: (1) Zarrouk media (freshwater-control) (2) seawater media SW 1 (3) seawater media SW2 and (4) seawater media SW 3. Th...
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PMID: 20655201
PDF is available here.
PDF is available here.
Abstract
We show that exogenously added macular carotenoids can quench RPE/choroid singlet oxygen. When the singlet oxygen quenching ability of the macular carotenoids was investigated in solution, it was shown that a mixture of meso-zeaxanthin, zeaxanthin, and lutein in a ratio of 1:1:1 can quench more sing...
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PMID: 20678467
PDF is available here.
PDF is available here.
Journal of Plant Physiology (167)16 2010
Abstract
I and II was performed with the aim to investigate salt-induced variations in photosystem composition. Net CO2 assimilation rate (Pn) increased under salinity up to 3 weeks of treatment then decreased to reach the value of 0mM-treated plants at the end of the experiment. For stomatal conductance (gs...
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PMID: 20619928
PDF is available here.
PDF is available here.
Abstract
A haloalkaliphilic archaeon, strain JX313(T), was isolated from a saline-alkaline soil from Daqing, Heilongjiang Province, China. Its morphological, physiological and biochemical features and 16S rRNA gene sequence were determined. Colonies of the strain were orange-red and cells were non-motile coc...
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PMID: 19915113
PDF is available here.
PDF is available here.
Abstract
We propose the previously deposited reference strain ATCC 12670(T) =DSM 44181(T) =NCIMB 10420(T), located in collections worldwide, as the type strain....
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PMID: 19915104
PDF is available here.
PDF is available here.
Abstract
These results and the differentiating biochemical and chemotaxonomic properties show that strain R4-1A(T) represents a novel species, for which the name Chryseobacterium culicis sp. nov. is proposed. The type strain is R4-1A(T) (=LMG 25442(T) =CCM 7716(T))....
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PMID: 19933582
PDF is available here.
PDF is available here.
Abstract
A Gram-staining-negative, yellow-coloured, strictly aerobic, non-spore-forming, rod-shaped bacterium, designated HS39(T), isolated from a soil sample collected from a natural Populus euphratica forest in Xinjiang, China, was characterized using a polyphasic approach. The isolate grew optimally at 30...
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PMID: 19933581
PDF is available here.
PDF is available here.
Abstract
A halophilic archaeon, strain RO1-6(T), was isolated from a marine solar saltern in eastern China. Cells of strain RO1-6(T) were pleomorphic and motile and stained Gram-negative. Strain RO1-6(T) grew well on complex medium and colonies were red-pigmented. It was able to grow at 20-50°C (optimum 37...
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PMID: 19946053
PDF is available here.
PDF is available here.
Abstract
A Gram-stain-positive, neutrophilic, rod-shaped bacterium, strain A1g(T), was isolated from activated sludge of a bioreactor and was subjected to a polyphasic taxonomic characterization. The isolate grew in the presence of 0-17.0 % (w/v) NaCl and at pH 6.0-9.0; optimum growth was observed in the p...
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PMID: 19946056
PDF is available here.
PDF is available here.
Abstract
Monascus purpureus NTU 568 was a mutant strain from M. purpureus HM105. The methanol extract of red mold rice fermented by this strain exhibited four major yellow pigment signals on HPLC profile. By repeated chemical chromatography methods, three new azaphilone derivatives, namely, monaphilone A (1)...
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PMID: 20597545
PDF is available here.
PDF is available here.
Meat Science (85)3 2010
Abstract
This study investigated the relationship between length (1, 2, 4, or 6 days) of exposure to carbon monoxide (CO) and the subsequent rate of loss of carboxymyoglobin color during display (0, 24, 48, 72 h) after repackaging in an oxygen permeable polyvinyl chloride (PVC) overwrap. In addition, the abi...
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PMID: 20416825
PDF is available here.
PDF is available here.
Abstract
We report the 214 million base pair (Mbp) genome sequence of the filamentous seaweed Ectocarpus siliculosus (Dillwyn) Lyngbye, a model organism for brown algae, closely related to the kelps (Fig. 1). Genome features such as the presence of an extended set of light-harvesting and pigment biosynthesis...
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PMID: 20520714
PDF is available here.
PDF is available here.
New Phytologist (188)2 2010
Abstract
• Floral scents and visual cues of the globeflower Trollius europaeus may play a key role in the attraction of Chiastocheta flies, involved in a highly specific nursery pollination mutualism. • Here, headspace collection and GC-MS were used to identify and quantify the volatile organic compounds...
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PMID: 20553385
PDF is available here.
PDF is available here.
Ecotoxicology (19)5 2010
Abstract
Our results suggested that exposure duration and concentration had a strong synergetic effect on antioxidant enzyme activity. The findings of the present study may be useful when this plant is used as a phytoremediator in arsenic-polluted water....
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PMID: 20221688
PDF is available here.
PDF is available here.
Abstract
An efficient gene-targeting system based on impairment of the nonhomologous end-joining pathway and the orotidine monophosphate decarboxylase gene (pyrG) in Aspergillus flavus was established. It was achieved by replacing the ku70 gene with the Aspergillus oryzae pyrithiamine resistance (ptr) gene a...
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PMID: 20298723
PDF is available here.
PDF is available here.
Phytochemistry (71)8-9 2010
Abstract
In this study, ethyl acetate and aqueous fractions from 117 collections of Australian macrofungi belonging to the mushroom genus Cortinarius were screened for antimicrobial activity against Staphylococcus aureus and Pseudomonas aeruginosa. Overall, the lipophilic fractions were more active than the...
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PMID: 20392467
PDF is available here.
PDF is available here.
Journal of Bacteriology (192)12 2010
Abstract
We screened a collection of S. aureus transposon mutants for pigment production variants. A total of 15 previously unidentified genes were discovered. Notably, disrupting metabolic pathways such as the tricarboxylic acid cycle, purine biosynthesis, and oxidative phosphorylation yields mutants with e...
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PMID: 20400547
PDF is available here.
PDF is available here.
Abstract
Condensation reactions of malvidin-3-glucoside with two representative oak wood furanic aldehydes (furfural and methylfurfural) were conducted in wine-like model solutions. Methylfurfural led to the formation of malvidin-3-glucoside-methylfurfural (603 m/z), whereas furfural led to the formation of...
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PMID: 20394421
PDF is available here.
PDF is available here.
Journal of Experimental Biology (213)Pt 10 2010
Abstract
We have found that on the ventral side most of these patches have very transparent scales that enhance, by reflection, the wing coloration when illuminated from the dorsal side. These glass scales furthermore create a strongly polarized iridescence when illuminated by obliquely incident light from t...
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PMID: 20435824
PDF is available here.
PDF is available here.
Phytochemistry (71)7 2010
Abstract
We isolated a cDNA encoding a UDP-dependent glycosyltransferase (UGT88D8), based on the structural similarity to flavonoid 7-O-glucuronosyltransferases (F7GAT) from Lamiales plants. Enzyme assays showed that the recombinant UGT88D8 protein catalyzes the 7-O-glucuronosylation of apigenin and its rela...
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PMID: 20223486
PDF is available here.
PDF is available here.
Bioresource Technology (101)7 2010
Abstract
Mechanical fractionation and aqueous or aqueous/organic two-phase partition approaches were applied for extraction and separation of extracellular terpenoid hydrocarbons from Botryococcus braunii var. Showa. A direct spectrophotometric method was devised for the quantitation of botryococcene and ass...
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PMID: 20005092
PDF is available here.
PDF is available here.
Abstract
We also found large quantities of decarboxylated xanthommatin, whose role as precursor of new pathways in ommochrome synthesis needs to be assessed. The catabolism of ommochromes, a process occurring when spiders revert from yellow to white, warrants further study....
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PMID: 20224921
PDF is available here.
PDF is available here.
Abstract
Our novel data indicate that induction of HO-1 protects the liver from LPS-mediated injury by reducing leukocytic inflammation and improving intrahepatic microcirculation....
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PMID: 20237939
PDF is available here.
PDF is available here.
Meat Science (84)4 2010
Abstract
The objective was to use natural pigments to replace sodium erythorbate (NaEry), a synthetic compound used as an antioxidant in sausage formulations, and to evaluate the oxidative stability of the samples. Six assays were prepared in which sodium erythorbate (ERY) at 0.05 g/100 g was substituted by...
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PMID: 20374848
PDF is available here.
PDF is available here.
Abstract
We suggest that this taxon is a new species, also within a new genus....
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PMID: 20487128
PDF is available here.
PDF is available here.
Abstract
Using a cell-based cytotoxicity assay three new cytotoxic azaphilones, including two stereoisomers and designated monapurones A-C (1-3), were isolated from the extract of Monascus purpureus-fermented rice (red yeast rice). Their structures were elucidated by detailed interpretation of spectroscopic...
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PMID: 20336024
PDF is available here.
PDF is available here.
Abstract
We assayed Dappu-RPCH in the shrimp Palaemon pacificus and in N. viridula. Here we show that this variant member of the AKH/RPCH family has no activity to concentrate the red, brown, yellow and blue pigments in the epithelium of the shrimp at physiological doses but is effective in mobilising lipids...
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PMID: 19686751
PDF is available here.
PDF is available here.
Annals of Botany (105)4 2010
Abstract
Colour is a consequence of the optical properties of an object and the visual system of the animal perceiving it. Colour is produced through chemical and structural means, but structural colour has been relatively poorly studied in plants.
This Botanical Briefing desc...
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PMID: 20142263
PDF is available here.
PDF is available here.
ISME Journal (4)2 2010
Abstract
We use targeted 16S rRNA gene surveys to evaluate the global affinities of cold-dwelling cyanobacteria from lake, stream and ice communities living at the northern limit of High Arctic Canada. Pigment signature analysis by HPLC confirmed the dominance of cyanobacteria in the phototrophic communities...
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PMID: 19890368
PDF is available here.
PDF is available here.
Abstract
Cronobacter spp. are opportunistic food-borne pathogens that are responsible for rare but highly fatal cases of meningitis and necrotizing enterocolitis in neonates. While the operon responsible for yellow pigmentation in Cronobacter sakazakii strain ES5 was described recently, the involvement of ad...
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PMID: 20038705
PDF is available here.
PDF is available here.
Abstract
By-products derived from food processing are attractive source for their valuable bioactive components and color pigments. These by-products are useful for development as functional foods, nutraceuticals, food ingredients, additives, and also as cosmetic products. Lycopene is a bioactive red colored...
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PMID: 20335956
PDF is available here.
PDF is available here.
Abstract
High-fat diets (HFDs) supplemented with the L-Trp and L-Leu-OEt derivatives of the monascus pigment were fed to mice. Compared to the HFD group, the average body weight gain of the four HFD-pigment groups was decreased by 13.6-50.9%, and the intra-peritoneal adipose tissues weight was reduced by 16....
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PMID: 20139611
PDF is available here.
PDF is available here.
Abstract
Cyanobacteria are a simple, but primitive and diverse group of microorganisms, with characteristics in common to both bacteria and algae. Their success as a group in a wide range of habitats has been attributed to their unique physiological characters and high adaptive ability under a wide range of...
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PMID: 20391755
PDF is available here.
PDF is available here.
Abstract
The metabolic engineering of plants is aimed at the realization of new biochemical reactions by transgenic cells. These reactions are determined by enzymes encoded by foreign or self-modified genes. Plants are considered to be the most interesting objects for metabolic engineering. Although they are...
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PMID: 20531473
PDF is available here.
PDF is available here.
Abstract
Wound size decreased significantly in both sides. The significantly increased percentage of epithelialization was higher (p = .0274) in the petroleum jelly-treated wounds on day 20. Tissue perfusion (LDF) increased significantly bilaterally in the center of the wound but only in the IHN-treated side...
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PMID: 20338121
PDF is available here.
PDF is available here.
Abstract
Proteasomes are composed of 20S core particles (CPs) of alpha- and beta-type subunits that associate with regulatory particle AAA ATPases such as the proteasome-activating nucleotidase (PAN) complexes of archaea. In this study, the roles and additional sites of post-translational modification of pro...
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PMID: 20671954
PDF is available here.
PDF is available here.
Tsitologiia (52)1 2010
Abstract
We suppose that, binding amyloid fibrils, red pigment hinders formation of prion aggregates and also, blocking fibril contact with chaperones, impedes prion propagation....
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PMID: 20302019
PDF is available here.
PDF is available here.
Abstract
We propose an instrumentation configuration that combines multi-distance frequency and broadband spectrometers to quantify chromophores in turbid media by using a hybrid spatially resolved algorithm. Preliminary results in solid phantoms as well as liquid dynamic homogeneous and inhomogeneous phanto...
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PMID: 20204788
PDF is available here.
PDF is available here.
Methods in Enzymology (471) 2010
Abstract
We studied necessitated the development of new methods for computing the spectra of the pure forms and the photoconversion yields. In vitro biochemical approaches help to assess the histidine kinase activity of bacteriophytochromes depending on light conditions, the phosphotransfer to response regul...
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PMID: 20946847
PDF is available here.
PDF is available here.
Physiologia Plantarum (138)1 2010
Abstract
Brief (1-100 min) irradiations with three different ultraviolet-B (UV-B) and ultraviolet-C (UV-C) wave bands induced increases the UV-absorbing pigments extracted from cucumber (Cucumis sativus L.) and Arabidopsis. Spectra of methanol/1% HCl extracts from cucumber hypocotyl segments spanning 250-400...
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PMID: 20070846
PDF is available here.
PDF is available here.
Biochemistry (New York) (74)13 2009
Abstract
The pathways of transformation of the chromophore of pigment-protein complexes have been studied at the terminal light-dependent stage of chlorophyll biosynthesis in plant leaves. The overall scheme of the sequence of photochemical and dark reactions of the pigment chromophore initiated by the react...
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PMID: 20210707
PDF is available here.
PDF is available here.
Abstract
Peanut testae are potent sources of polyphenols. When the water extracts and acid hydrolysates of five different-colored testae were analyzed by HPLC, chromatograms monitored at 280 nm varied remarkably, whereas two major peaks in the chromatograms monitored at 530 nm were detected only in kernels h...
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PMID: 19807153
PDF is available here.
PDF is available here.
Abstract
We analyse subfossil moa feathers from Holocene New Zealand rockshelter sites and demonstrate that both ancient DNA and plumage information can be recovered from their upper portion, allowing species identification and a means to reconstruct the appearance of extinct taxa. These ancient DNA sequence...
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PMID: 19570784
PDF is available here.
PDF is available here.
Photosynthesis Research (102)1 2009
Abstract
Photosynthetic parameters of phytoplankton and sea ice algae from landfast sea ice of the Chukchi Sea off Point Barrow, Alaska, were assessed in spring 2005 and winter through spring 2006 using Pulse Amplitude Modulated (PAM) fluorometry including estimates of maximum quantum efficiency (F(v)/F(m)),...
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PMID: 19728139
PDF is available here.
PDF is available here.
Abstract
These results showed that all ophycocyanin, phycoerythrin and carotenoid were more sensitive to EMA than other pigments, the cells of M. aeruginosa was stressed by EMA with the occurrence of cyanophycin granules and the photosynthesis pigments and ultrastructure of M. aeruginosa were quickly destroy...
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PMID: 19557299
PDF is available here.
PDF is available here.
Abstract
Mercury is known to interact with different parts of living systems causing serious biochemical and physiological disorder. In order to know the effect of mercury (Hg2+) ion on chloroplasts, the cell free organelle are incubated in an isotonic buffer medium in presence of mercury ion. The metal ion...
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PMID: 20027872
PDF is available here.
PDF is available here.
Photosynthesis Research (101)2-3 2009
Abstract
The primary reactions of purple bacterial photosynthesis take place within two well characterized pigment-protein complexes, the core Reaction Center-Light Harvesting 1 (RC-LH1) complex and the more peripheral Light Harvesting 2 (LH2) complex. These antenna complexes serve to absorb incident solar r...
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PMID: 19544008
PDF is available here.
PDF is available here.
Abstract
We demonstrate the capacity of the blue fluorescent chlorophyll catabolites to signal symptoms of programmed cell death in a plant. We report on studies of bright blue luminescent rings on the peel of very ripe bananas, which arise as halos around necrotic areas in 'senescence associated' dark spots...
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PMID: 19805212
PDF is available here.
PDF is available here.
Abstract
We summarized the current opinions in the pigment-protein complexes from anoxygenic phototrophic bacteria, including their chemical compositions, crystal structures and functions, homology of protein sequence. In particular, we depicted the novel light-harvesting complexes namely LH3 and LH4. The pr...
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PMID: 20030050
PDF is available here.
PDF is available here.
Abstract
Ultraviolet radiation (UV) though harmful but is an important and unavoidable component of terrestrial ecosystem to which plants have been exposed since their migration from aquatic to land habitat. Incoming UV-B radiation and heavy metals abundance in contaminated soils are significant environmenta...
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PMID: 20136048
PDF is available here.
PDF is available here.
Journal of Physical Chemistry B (113)32 2009
Abstract
I and pyranomalvidin-3-O-coumaroylglucoside II, and the respective pK(a) were determined using NMR, visible spectroscopy, and mass spectrometry techniques. The three equilibria involve protonation of the pyranoflavylium cation of vitisin B (pK(a1)) and two deprotonations (pK(a2) and pK(a3)). For pig...
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PMID: 19719269
PDF is available here.
PDF is available here.
Development (136)15 2009
Abstract
We analyze two recessive zebrafish mutations that affect de novo purine synthesis, gart and paics. gart encodes phosphoribosylglycinamide formyltransferase, phosphoribosylglycinamide synthetase, phosphoribosylaminoimidazole synthetase, a trifunctional enzyme that catalyzes steps 2, 3 and 5 of inosin...
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PMID: 19570845
PDF is available here.
PDF is available here.
Abstract
We selected a model system, three allopatric closely related species of cordylid lizards that differ in skin reflectance, to test this hypothesis. Cordylus niger and Cordylus oelofseni are melanistic and inhabit peninsular and montane areas, respectively, whereas Cordylus cordylus is more widespread...
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PMID: 19739391
PDF is available here.
PDF is available here.
Journal of Genetics (88)2 2009
Abstract
I determined inheritance of the colour polymorphism using two populations (one with only white morph and other with both morphs). I conducted experimental crosses within and between floral morphs to determine whether patterns of segregation in offspring conform to single-gene predictions. Data from...
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PMID: 19700859
PDF is available here.
PDF is available here.
Abstract
Abstract
These results suggest that pink pigment is a phycoerythrin-like protein. It inhibited the growth of green algae, Chlorella fusca and Chlamydomonas reinhardtii, but not other cyanobacteria or true bacteria. The concentration at which growth inhibition 50% occurred was 0.5, 6 and more than 10 mg ml(-1...
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PMID: 19271155
PDF is available here.
PDF is available here.
Abstract
To study the toxic effect of a heavy metal on the occurrence of melano macrophage centres (MMC) of liver, spleen and kidney. Tilapia mossambica were exposed to median lethal concentration of cadmium chloride for 120 hours. Routine histological method was adopted to prepare the tissue sections and to...
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PMID: 20120487
PDF is available here.
PDF is available here.
Abstract
Free radical scavenging compounds play important roles as health-protecting factors. Betalains are natural water-soluble pigments present in most plant families belonging to the order Caryophyllales. They are the subject of increasing attention following the discovery of their antiradical capacity,...
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PMID: 19456119
PDF is available here.
PDF is available here.