Protamines substitute for histones in the chromatin of sperm during the haploid phase of spermatogenesis. They compact sperm DNA into a highly condensed, stable and inactive complex (By similarity).
Source:http://purl.uniprot.org/SHA-384/BB2A2F64883FE67AD95515FBCDEA8843BDD34AAFE6A8E8E8BBC675268EAF35B72881606A4545F0189151AD1D3DEBAAC4
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