Sperm protamine P1 (Cysteine-rich protamine)
1_MARYR 6_ CCRSQ 11_ SRSRY 16_ YRQRQ 21_ RSRRR 26_ RRRSC 31_ QTRRR 36_ AMRCC 41_ RPRYR 46_PRCRR
1: 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