ABCF2 and clear cell adenocarcinoma: We have produced an antibody to the ATP-binding cassette superfamily F (ABCF2) protein and demonstrated that ABCF2 protein expression is higher in clear cell adenocarcinoma (CCC) of the ovary than in other histologic types and may predict chemotherapy response and prognosis (Tsuda et al, 2005a; Nishimura et al, 2007).