protein coding gene MGI:1913972 Pf20 O Gene http://identifiers.org/mgd/MGI:1913972 4930524F24Rik Spag16 sperm associated antigen 16 4930524F24Rik|4930585K05Rik|4921511D23Rik|Wdr29|Pf20 + 4921511D23Rik genetic mapping 4930585K05Rik Wdr29