. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FROG EGG PHOSPHOPROTEIN PHOSPHATASE 237. 10 MINUTES 15 20 FIGURE 1. Rates of PPPase activity of yolk platelets and YPA, incubated in M and M NaCl, with or without added phosvitin (10 mM P). Filled circle: yolk platelets + phosvitin in M NaCl. Open circle: yolk platelets in M NaCl. X: YPA + phosvitin in M NaCl. Filled triangle: YPA in M NaCl. Dotted circle: yolk platelets + phosvitin in M NaCl. Circle, right half filled: YPA + phosvitin in M NaCl. Circle, left half filled: YPA in M NaCl. Op
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FROG EGG PHOSPHOPROTEIN PHOSPHATASE 237. 10 MINUTES 15 20 FIGURE 1. Rates of PPPase activity of yolk platelets and YPA, incubated in M and M NaCl, with or without added phosvitin (10 mM P). Filled circle: yolk platelets + phosvitin in M NaCl. Open circle: yolk platelets in M NaCl. X: YPA + phosvitin in M NaCl. Filled triangle: YPA in M NaCl. Dotted circle: yolk platelets + phosvitin in M NaCl. Circle, right half filled: YPA + phosvitin in M NaCl. Circle, left half filled: YPA in M NaCl. Open triangle: yolk platelets in M NaCl. Incubated at pH , 28° C. centrations show that most of the activity of the large yolk was due to its action on phosvitin in low salt but to its endogenous activity when the yolk was solubilized (see also Figure 1). Fractionation of ovarian homogenates indicated that only the large and small yolk granules had any endogenous Pj released. Ghosts from the yolk platelets, the pigmented fractions and the supernatant proteins had no endogenous activity (Nass, 1961). (4) The phosphorus/nitrogen ratio of yolk was , while the ratio of small yolk was , ghosts , and the pigmented fraction YPB fractions had somewhat lower ratios () from Shumway (1940) stage 1 through stage 20. Stage 25 YPB had a distinctly lower ratio (), probably related to new proteins being formed and precipitating with the euglobulin fraction ( acto- myosin). The increasing PPPase activities of the ovarian fractions against phos-. 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-; Red
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