Vitellogenin as a multigene family. Not all Xenopus vitellogenin genes may be in an "expressible" configuration.


DNA-cDNA titrations suggest that the Xenopus genome comprises two albumin genes, whereas there are 12 to 16 vitellogenin-like genes. Both sets of genes are expressed in liver, those coding for albumin constitutively, but vitellogenin only when induced by estrogen in both male and female frogs. Mild micrococcal nuclease digestion of liver nuclei to separate… (More)


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