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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Xenopus laevis sperm proteins, previously identified as surface proteins with egg coat binding capability, are indeed histone H4, histone H3, and sperm specific protein SP2.

Recently, four Xenopus sperm proteins thought to be involved in binding to the egg envelope were identified (Lindsay and Hedrick, J. Exp. Zool., 245:286-293, '88). We have studied the three more abundant ones of apparent molecular weight of 14, 19, and 25 kd in SDS-PAGE. We have shown that these proteins are indeed nuclear basic proteins: the 14 kd is the histone H4, the 19 kd is the histone H3, and the 25 kd is the sperm-specific protein SP2.[1]


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