. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. DIXOKI. \<;K!.|. \TK. RESIMKATION 279 system in higher plants, it is assumed iliat CiSTT oxidation is tied up with ascorbate metabolism. This, however, is in need of much further study. Perhaps it is \\orth mentioning that the reaction, cysteine + oxidized glutathione ^± GSH + cystine, can proceed spontaneously; hence, cysteine oxidation might simply repre- sent GSH oxidation. Alternative explanations are available. 100 90 80 <: O 70 60 I- 50 5 Np <ys 30 20 10 0 0 5x10"4M ASCORBATE. 20 40 60 80 100 MINUTES FIGU
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. DIXOKI. \<;K!.|. \TK. RESIMKATION 279 system in higher plants, it is assumed iliat CiSTT oxidation is tied up with ascorbate metabolism. This, however, is in need of much further study. Perhaps it is \\orth mentioning that the reaction, cysteine + oxidized glutathione ^± GSH + cystine, can proceed spontaneously; hence, cysteine oxidation might simply repre- sent GSH oxidation. Alternative explanations are available. 100 90 80 <: O 70 60 I- 50 5 Np <ys 30 20 10 0 0 5x10"4M ASCORBATE. 20 40 60 80 100 MINUTES FIGURE 1. A typical recording of decreasing effect of ascorbate addition with time and oxygen concentration on metabolism of intact cells of Gymnodinium nclsoni. The experiment \\.t- done in triplicate. Rate of oxygen uptake is proportional to the slope of the lines. From these pilot experiments, it is difficult to determine the contribution of a GSTT-ascorbate system to the endogenous respiration of the organism. The large residual respiration remaining after azide and cyanide treatments of normal cells presumably occurs via an electron transport chain other than the cytochromes. Evidence of such a situation exists for other algae: . huihacua, for example, is insensitive to CO and sensitive to cyanide and azide only at high concentrations (Webster and Frenkel. 1953) ; cytochrome oxidase apparently is absent in some. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
