BH3-interacting domain death agonist (BID)

The major proteolytic product p15 BID allows the release of cytochrome c (By similarity). Isoform 1, isoform 2 and isoform 4 induce ICE-like proteases and apoptosis.

Isoform 3 does not induce apoptosis. Counters the protective effect of Bcl-2.