Immunological identification and localization of the predominant nuclear protein of the amphibian oocyte nucleus.


Nuclei of vitellogenic oocytes of the frog, Xenopus laevis, contain a prominent protein, representing about 10% of nuclear protein, which is characterized by a polypeptide of M(r) 30,000. This protein is highly phosphorylated and acidic, displays several isoelectric variants with pI values ranging from 4.7 to 5.3, shows a high thermostability, is not stably… (More)


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