Immunogen sequence: IHEVSTVSHA DADCFVCVFL SHGEGNHIYA YDAKIEIQTL TGLFKGDKCH SLVGKPKIFI IQACRGNQHD VPVIPLDVVD NQTEKLDTNI TEVDAASVYT L. Caspases are cysteine proteases, expressed as inactive precursors, that mediate apoptosis by proteolysis of specific subs