Spermatid maturation protein 1 N-terminal domain-containing protein MGERAYHGAQ VCSGTNPRKC QDLGDSILLL LGSFILLNVW INVVTLLWKH LKSSLRILFR HFFPKAQSDR TAWLPQSGGV PPGGARRPRP QLGRSRTSTS APGRSCRN