Acts as a negative mediator of apoptosis. Suppresses the TNF-mediated apoptosis by inhibiting caspase-8 activity but not the processing of procaspase-8, subsequently resulting in inhibition of BID cleavage and caspase-3 activation (By similarity). TFIP8_BOVIN TNFAIP8 MHFEAEESKEVATDVFNSKNLAVQAQKKILGKMASKSIATTLIDDTSSEVLDELYRVTKEYTQNKKEAEKIIKNLIKTVIKLAILYRNNQFNQDELALMEKFKKKVHQLAMTVVSFHQVDFTFDRNVLSKLLNECREMLHQIIQRHLTTKSHGRVNNVFDHFSDCDFLAALYNPFGNYKPHLQKLCDGINKMLDEENI Tumor necrosis factor alpha-induced protein 8 198