Putative steroid 6-beta-hydroxylase. an organic molecule + O2 + reduced [NADPH--hemoprotein reductase] = an alcohol + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] Highly expressed in liver and intestine. Moderate expression in gill and spleen. Low expression in kidney, brain and heart. Belongs to the cytochrome P450 family. Due to a recent gene duplication event, CYP3A30 and CYP3A56 are very similar. Because of this it was not possible to distinguish between the two genes when measuring the tissue expression.