Sperm surface proteins involved in sperm-egg fusion. They consist of two subunits, fertilin alpha (ADAM1a) and beta (ADAM2), both of which belong to the metalloprotease-disintegrin protein family. The beta subunit does not have catalytic activity.

Synonyms: PH-30 Fusion Protein, PH-30 beta, PH 30 Protein, alpha, PH-30, PH-30 alpha, Fertilin Protein, PH 30 beta, ADAM 2 Protein, Fertilin beta, ADAM2 Protein, ADAM1 Protein, Fertilin, PH 30 Fusion Protein, alpha, Fertilin, PH-30 Protein, 0, ADAM1a Protein, Fertilins, EC 3.4.24.-, Fertilin alpha, PH 30 alpha, ADAM 1a Protein, beta, Fertilin, beta, PH-30