The apyrase activity of various protein fractions of the frog's egg

Barth, L. G.; Jaeger, Lucena

doi:10.1002/jcp.1030300202

Cited by 21 publications

(1 citation statement)

References 11 publications

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“…Apyrase measurements, summarized in Table III, show that the activity of this enzyme in homogenates of anterior cells is 70 per cent that in homogenates of posterior cells. In adult tissues (Frank et al, 1950) and in amphibian embryos (Earth and Jaeger, 1947) apy rases with different pH activity characteristics have been extracted and thus for quantitative measurements of apyrases from different sources it is necessary to determine pH-activity curves. Accordingly an attempt was made to determine the effect of pH on apyrases from anterior and posterior cells.…”

Section: Table IIImentioning

confidence: 99%

Chemical Analyses of Anterior and Posterior Blastomeres of Ciona Intestinalis

Berg¹

1957

The Biological Bulletin

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Segregations of specific cytoplasms occur during early cleavage of the ascidian egg (Conklin, 1905) of which the most obvious is the localization of the myoplasm, presumptive for larval musculature, in the posterior cells at the four-cell stage. Cytological (Meves, 1913;Duesberg, 1915;Conklin, 1931) and cytochemical (Ries, 1937) studies indicate the localization of granules, presumably mitochondria, within the myoplasm. Recently Reverberi ( 1956) followed the distribution of mitochondria during development, using the vital stain, Janus green. The quantitative measurements of cytochrome oxidase in anterior and posterior blastomeres (Berg, 1956) gave a biochemical confirmation of the above studies as regards the localization of mitochondria.

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Section: Table IIImentioning

confidence: 99%