High levels of ABCC1, ABCC2, ABCC3 and ABCC4 were found in HB cell lines and HB specimens, and interestingly, higher expression of ABCC4, but not of other ABCC genes was observed in HB subtypes with a more aggressive phenotype (C2 vs. C1) [10]. The gene discussed is ABCC2; the disease is hemoglobin measurement.