What's the difference between phycocyanin and pigment?
Phycocyanin
Definition:
(n.) Alt. of Phycocyanine
Example Sentences:
(1) The behaviour of the C-phycocyanin aggregate species from Anacystis nidulans suggested that they were of appreciably lower molecular weight than those observed in extracts of Anabaena variabilis.
(2) The latter were conditioned by the absorption of allophycocyanin, phycocyanin, and probably by phycoerythrin present in the form of different associates.
(3) Globins and phycocyanins are two classes of proteins with different function, different ligands, and no substantial sequence similarity, yet the conformations of their polypeptide chains show very similar folding patterns.
(4) During serial subculturing of the mutant strains, suppressor mutations, which allowed cells to regain the ability to synthesize phycocyanin, arose at significant frequency.
(5) Its visible absorption spectrum, with a maximum at 646 nm, is more similar to that of allophycocyanin than phycocyanin.
(6) Both phycocyanin and phycoerythrocyanin form double discs (alphabeta)6 which are visible as ring-shaped structures by electron microscopy.
(7) Northern blot experiments using genomic DNA hybridization probes indicated that phycobiliprotein mRNAs were absent in the dark, whereas cells exposed to light contained two allophycocyanin mRNA transcripts, 1.4 and 1.6 kilobases in length, and one phycocyanin mRNA transcript, 3.0 kilobases in length, providing evidence that phycobiliproteins are encoded in photogenes which are only transcriptionally active in the light.
(8) The content of chlorophyll is almost constant during the first 20 days of growth while the content of phycocyanin increases; then the content of the both pigments decreases.
(9) Amino acid residues which might contact the bilin at each of the two variable sites were inferred by sequence alignment with phycocyanins.
(10) The three spectroscopically distinct classes of phycobiliproteins characteristic of the Cyanophyta and Rhodophyta-phycocyanins, allophycocyanins, and phycoerythrins-share no common antigenic determinants detectable by the Ouchterlony double diffusion technique.
(11) The bile-pigment chromophores of C-phycoerythrin (phycoerythrobilin) and C-phycocyanin (phycocyanobilin) were cleaved from their respective proteins with boiling methanol or butan-1-ol.
(12) The crystal structure of the light-harvesting protein-pigment complex C-phycocyanin from the cyanobacterium Agmenellum quadruplicatum has been determined by Patterson search techniques on the basis of the molecular model of C-phycocyanin from Mastigocladus laminosus.
(13) The fluorescence of purified biliproteins (phycocyanin 645, phycocyanin 612, and phycoerythrin 545) from three cryptomonads, Chroomonas species, Hemiselmis virescens, and Rhodomonas lens, and C-phycocyanin from Anacystis nidulans has been time resolved in the picosecond region with a streak camera system having less than or equal to 2-ps jitter.
(14) We conclude that on-line monitoring of cyanobacterial culture fluorescence based on phycocyanin is a rapid, efficient and also versatile method for determining viable cell concentration.
(15) The structure of the biliprotein C-phycocyanin from the thermophilic cyanobacterium Mastigocladus laminosus has been determined at 3 A resolution by X-ray diffraction methods.
(16) The amino acid sequences of both subunits of the C-phycocyanin from the thermophilic cyanobacterium Mastigocladus laminosus have been determined.
(17) Solutions of C-phycocyanin of very low concentrations were examined by sedimentation-velocity studies in the Spinco model E ultracentrifuge equipped with a photoelectric scanning system and a monochromator.
(18) In conclusion, phycocyanin is a cytotoxic photosensitizer that exhibits specific binding to plaque and is activated at a wavelength minimally absorbed by blood.
(19) The other part of the molecule is made up of four repeated domains that are highly homologous to the N-terminal regions of the phycocyanin rod linker polypeptides.
(20) Furthermore, the phycocyanin of both strains of M. laminosus does not demonstrate any large amount of 19S or higher aggregates at any pH value.
Pigment
Definition:
(n.) Any material from which a dye, a paint, or the like, may be prepared; particularly, the refined and purified coloring matter ready for mixing with an appropriate vehicle.
(n.) Any one of the colored substances found in animal and vegetable tissues and fluids, as bilirubin, urobilin, chlorophyll, etc.
(n.) Wine flavored with species and honey.
Example Sentences:
(1) The results also suggest that the dispersed condition of pigment in the melanophores represents the "resting state" of the melanophores when they are under no stimulation.
(2) Differences between the albino vs pigmented strains were observed following injections of saline.
(3) Two lectins, wheat germ agglutinin (WGA) and peanut agglutinin (PNA), were used to compare domains within the interphotoreceptor matrices (IPM) of the cat and monkey, two species where the morphological relationship between the retinal pigment epithelium (RPE) and photoreceptors is distinctly different.
(4) Uptake studies with 22Na were performed in cultured bovine pigmented ciliary epithelial cells, in order to characterize mechanisms of Na+ transport.
(5) CW Nd:YAG light transmitted by fiber optic cable and sapphire crystal was applied transsclerally to the ciliary body of pigmented and albino rabbits.
(6) The evolution and function of multiple forms of a given photosynthetic pigment in vivo are discussed.
(7) Changes in protein phosphorylation induced by phagocytic challenge were identified in cultured rat retinal pigment epithelium (RPE) following exposure to isolated rat rod outer segments (ROS) or to polystyrene latex microspheres (PSL).
(8) Both categories frequently showed pellagrous pigmentation and mucocutaneous signs of B-vitamin deficiency.
(9) We show that, in digitonin-permeabilized goldfish xanthophores, the pigment organelles can be induced to disperse by a combination of cAMP, ATP, and xanthophore cytosol.
(10) A red pigment produced by the actinomycete strain B 4358 was identified as butyl-meta-cycloheptylprodiginine (4) by 1H, 13C and correlation via long range coupling NMR spectra.
(11) Two unusual types of oral mucosal pigmentation are reported.
(12) These results are consistent with the idea that RPE pigment dispersion is triggered by a substance that diffuses from the retina at light onset.
(13) Rhabdomeres are substantially smaller and visual pigment is nearly eliminated when Drosophila are carotenoid-deprived from egg to adult.
(14) It is hypothesized that deposition of bilirubin in tissues takes place as an ongoing event, the deposited pigment being eliminated by bilirubin oxidase in healthy infants.
(15) The calculated separation between the centers of these two pigments (using an extended version of the exciton theory) is about 10 A, the pigments' molecular planes are tilted by about 20 degrees, and their N1-N3 axes are rotated by 150 degrees relative to each other.
(16) We have investigated enhancement of pigmentation in inbred C3H- mice using tail skin as a model for testing the effects of phosphorylated DOPA (DP) and ultraviolet radiation.
(17) Although mucocutaneous pigmentation was not present in two of the three patients, the features of intestinal polyposis are consistent with those of Peutz-Jeghers syndrome.
(18) Cytochromes b, c(555), possibly c(1), cytochrome oxidase, a carbon monoxide-binding pigment, and flavoproteins were detectable in the spectra of both intact cells and mitochondria.
(19) The addition of alcohol to the drinking-water resulted in the formation of stones rich in pigment.
(20) The total number of neuronal cell bodies was 25% lower in AIDS (P less than 0.01) than in 12 age-matched controls, although the volume density of neuronal melanin did not differ from that of controls because the percentage of pigmented cell bodies was higher (P less than 0.01) and the cell bodies were more fully packed with melanin in AIDS.