. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 264 I. R. CRKliC, J. J. MAcISAAC AXI) M. A. PARKER obtained with glycogen and with other phosphorylated hexoses of the Embden- Mc'verhof system. \\'hat this means is not clear; we shall remark only that hy- brids do not seem to be significantly less well endowed than their normal controls with the enzymes required to transform glucose-6-phosphate into lactic acid. l:nictosc-l,6-di phosphate (magnesium} The rates at which homogenized R. pipicns embryos of various ages produce lac- tic acid in the presence and absence of exoge
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 264 I. R. CRKliC, J. J. MAcISAAC AXI) M. A. PARKER obtained with glycogen and with other phosphorylated hexoses of the Embden- Mc'verhof system. \\'hat this means is not clear; we shall remark only that hy- brids do not seem to be significantly less well endowed than their normal controls with the enzymes required to transform glucose-6-phosphate into lactic acid. l:nictosc-l,6-di phosphate (magnesium} The rates at which homogenized R. pipicns embryos of various ages produce lac- tic acid in the presence and absence of exogenous hexose diphosphate are exempli- fied in Figure 9. As usual, the endogenous rates are very low, and glycolysis is stimulated by the presence of the exogenous substrate. Figure 10 shows that ho- mogenized hybrids do not differ significantly from homogenized R. pipiens con- trols in the rates at which they glycolyze hexose diphosphate; as before, this is interpreted to mean that the relevant enzymes are present in normal 80 120 FIGURE 8. Rates of lactic acid production by anaerobic homogenates. Clutch Solid lines, A', pipicns. Broken lines, hybrids. Substrate, upper two curves, glucose-6-phosphate. Substrate, lower two curves, endogenous. Abscissa, standard age in hours, 18° C. Ordinate, /ig. lactic acid per embryo per hour, 24° C. In these experiments, the factor of initial lactic acid has not been controlled (see (iciicnil cluti-iictcristic.'i t>f the system).. 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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