Nucleotide substitution: T2105C Amino acid replacement: S687P.
T10264757C
T2105C
S687P | can-PA
S687P
Early stages of spermatogenesis up through mature primary spermatocytes are present and normal. Postmeiotic stages are completely absent. Mutant testes have an abundance of mature primary spermatocytes with large, round nuclei and prominent nucleoli. Spermatocytes arrest in the G2/M transition of meiosis I with partial chromosome condensation.