This family of proteins is found in mammals. There are a number of conserved cysteines but it is unlikely to be a zinc-finger family. Proteins in this entry includes PATE4 from mice. Prostate and testis expressed protein 4 (PATE4, also known as PATE-B) belongs to the PATE family. It may modulate the function of nicotinic acetylcholine receptors and may enhance sperm motility [].