Eppin

Eppin

(ep'in),
A protein found in the mammalian testis and epididymis, of uncertain function, under investigation as an immunizing agent to induce reversible male infertility.
References in periodicals archive ?
They noticed that the epididymis adds the protein Eppin to the surface of sperm as they mature.
O'Rand's team used synthetic Eppin as a vaccine in nine male macaques that already had fathered offspring.