Arsenite is a carcinogenic compound which can act as a co-mutagen by inhibiting DNA repair. Arsenite-resistance protein 2 is thought to play a role in arsenite resistance [1].

1: Expression cloning for arsenite-resistance resulted in isolation of tumor-suppressor fau cDNA: possible involvement of the ubiquitin system in arsenic carcinogenesis. Rossman TG, Wang Z; Carcinogenesis 1999;20:311-316. PMID:10069470