Immunogen sequence: NKALREENRM LSKENKILQV FWEEHKASLG REESRAPSPL LHKDSASLEV VKKDHVALQV PRGKEDSTLQ LLREENRALQ QLLEQKQAY Highest antigen sequence identity to the following orthologs: Mouse - 71%, Rat - 71%. SPERT (spermatid associated protein), also known a