Dev Growth Differ 1983 Jan 01;256:547-551. doi: 10.1111/j.1440-169X.1983.00547.x.

Intracellular Localization of DNA Polymerases in the Oocyte of Starfish, Asterina pectinifera: (starfish/DNA polymerase α/DNA polymerase β/germinal vesicle/enucleation).

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Oocytes of the starfish, Asterina pectinifera, were separated into karyoplasts and cytoplasts by centrifugation in a sucrose density gradient in the presence of cytochalasin B. More than 90% of the DNA polymerase activity of whole oocytes was recovered in the karyoplasts, and less than 10% in the cytoplasts. DNA polymerase α was specifically localized in karyoplasts. Of the DNA polymerase β activity of whole oocytes, 70-80% was found in the karyoplasts, and about 15% in the cytoplasts. The problem of whether DNA polymerases are localized within germinal vesicles in starfish oocytes is discussed.

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