This family consists of several mammalian male enhanced antigen 1 (MEA1) proteins. The Mea-1 gene is found to be localised in primary and secondary spermatocytes and spermatids, but the protein products are detected only in spermatids. Intensive transcription of Mea-1 gene and specific localisation of the gene product suggest that Mea-1 may play a important role in the late stage of spermatogenesis [1].

1: Genomic sequence analysis of the bovine male-enhanced antigen-1 (Mea-1) and differential localization of its transcripts and products during spermatogenesis. Kondo M, Terouchi S, Tsukasa N, Sato S, Ishida N, Sutou S; DNA Seq 1996;6:75-85. PMID:8907304