Putative transcription factor. Isoform 3 may play a role in early spermatogenesis.
Isoform 3 is testis specific. Isoform 2 is pancreas specific.
Contains 1 bHLH (basic helix-loop-helix) domain.
Isoform 3 is specifically expressed in primary spermatocytes at the pachytene stage, but not those at leptonema stage. Not expressed in other testicular cells, including spermatogonia located in the basal compartment of the seminiferous tubule or spermatids.