What's the difference between chromatophore and metachrosis?
Chromatophore
Definition:
(n.) A contractile cell or vesicle containing liquid pigment and capable of changing its form or size, thus causing changes of color in the translucent skin of such animals as possess them. They are highly developed and numerous in the cephalopods.
(n.) One of the granules of protoplasm, which in mass give color to the part of the plant containing them.
Example Sentences:
(1) In the brownish skin and in the black spots of the dorsal region all types of chromatophores are found.
(2) An analogous finding in the human eye after a perforating iris lesion was growth of chromatophores on the anterior lens capsule.
(3) This makes it possible to consider them as chromatophores of an independent type.
(4) Phosphatidylethanolamine is essentially equally distributed on the inner and outer surfaces of the chromatophores, while most proteins exist at the outer surface.
(5) The decay of the flash-induced electric potential across the chromatophore membrane measured by the carotenoid band shift was 20% accelerated by about one valinomycin molecule per 4700 bacteriochlorophyll, i.e.
(6) This process is inhibited by o-phenanthroline as well as upon extraction of quinones from chromatophores, but not by antimycin A, rotenone or CN-.
(7) The P+QA- and P+QB- charge recombination decay kinetics were studied in reaction centers from Rhodopseudomonas viridis reconstituted in phosphatidylcholine bilayer vesicles (proteoliposomes) and in chromatophores.
(8) Light induced quenching of 9-aminoacridine and atebrin fluorescence in chromatophores, while the fluorescence was enhanced in the heavy chromatophores.
(9) OCC has been shown to apparently increase the electrical conductivity of the chromatophore membrane, a fact which may be relevant to the mechanism of action of this probe.
(10) C-terminal residues were not removed after the digestion of chromatophores or spheroplasts.
(11) These results are consistent with two hypotheses (a) the chromatophores are a mixed population of vesicles, only a small fraction (10%) of which possess an active ATP synthesizing system (b) the activity of the ATP synthesizing system, though driven by a proton motive force, is controlled by electron transport processess.
(12) The extent of the reaction was increased markedly with excess exogenous ferrocytochrome c but only slightly in chromatophores.
(13) The isolated beta subunit reconstituted an active F1 hybrid with the F1 of Rhodospirillum rubrum chromatophores from which the beta subunit had been removed.
(14) The significance of the terminal residues of the red pigment-concentrating hormone (RPCH: Glu-Leu-Asn-Phe-Ser-Pro-Gly-Trp-NH2) for its blanching effect on crustacean chromatophores has been investigated.
(15) Biochemical analyses of the dorsal integument of the isopod, Armadillidium vulgare, revealed that sepiapterin, biopterin, pterin, isoxanthopterin and uric acid accumulated in the yellow-colored chromatophores which are distinguishable from ommochrome chromatophores.
(16) In the presence of Mg2+, the following pattern rules: (i) uncoupler-stimulated ATP hydrolysis of Rhodospirillum rubrum chromatophores which shows an optimum concentration of the divalent cation; (ii) ATP-induced proton pumping in chromatophores; (iii) light-induced ATP synthesis in chromatophores; (iv) no or very low ATPase activity of purified F1-ATPase unmasked by diethylstilbestrol or n-octyl beta-D-glucopyranoside.
(17) Guanidinated B870 alpha polypeptides from both the cytoplasmic-side-out chromatophores and the periplasmic-side-out membrane vesicles were purified and digested with trypsin.
(18) When the free Mg2+ concentration was raised to 5.5-8.8 mM this ratio decreased from 1028 to 540 when the yeast pyrophosphatase was used and from 754 to 46 when chromatophores were used.
(19) After chromatophore solubilization in the presence of beta-ME and subsequent SDS-polyacrylamide gel electrophoresis, exogenously added reaction centers B and C could be localized in a complex of no less than 100 to 200 kdaltons.
(20) Among several pH indicators tested, bromothymol blue (BTB) and neutral red (NR) showed absorbance changes on illumination of chromatophores.
Metachrosis
Definition:
(n.) The power og changing color at will by the expansion of special pigment cells, under nerve influence, as seen in many reptiles, fishes, etc.