UGT1A6 and ocular melanoma: Furthermore, Buckley and Klaassen (2007) showed that, in mice, female-predominant expression of UGT2A1 was observed in OM, while male-predominant expression of UGT1A6 was rather observed in lung, suggesting that expression of these OM UGTs could also be gender-dependent (Buckley and Klaassen, 2007).