Predicted to enable zinc ion binding activity. Involved in positive regulation of protein processing and spermatogenesis, exchange of chromosomal proteins. Acts upstream of or within flagellated sperm motility; single fertilization; and spermatogenesis. Located in nucleus. Part of nucleosome. Is expressed in spermatid and testis. Orthologous to human TNP2 (transition protein 2). [provided by Alliance of Genome Resources, Apr 2022]