VERL, the egg vitelline envelope (VE) receptor for lysin, is a giant unbranched glycoprotein comprising 30% of the vitelline envelope. Lysin binds to VERL and creates a hole as VERL molecules lose cohesion and splay apart. These proteins are important in the mediation of fertilisation [1]

1: Full-length sequence of VERL, the egg vitelline envelope receptor for abalone sperm lysin. Galindo BE, Moy GW, Swanson WJ, Vacquier VD; Gene. 2002;288:111-117. PMID:12034500