. "\"Catalysis of the reaction: vitamin D3 + NADPH + H+ + O2 = calcidiol + NADP+ + H2O.\" [ISBN:0471331309, MetaCyc:RXN-9829]" . . "vitamin D3 25-hydroxylase activity" . "cholecalciferol 25-hydroxylase activity" . "MetaCyc:RXN-9829" . "Reactome:REACT_102234 \"25-Hydroxylation of vitamin D3 in liver, Danio rerio\"" . "Reactome:REACT_13458 \"25-Hydroxylation of vitamin D3 in liver, Homo sapiens\"" . "Reactome:REACT_28168 \"25-Hydroxylation of vitamin D3 in liver, Xenopus tropicalis\"" . "Reactome:REACT_32506 \"25-Hydroxylation of vitamin D3 in liver, Mus musculus\"" . "Reactome:REACT_79485 \"25-Hydroxylation of vitamin D3 in liver, Sus scrofa\"" . "Reactome:REACT_87444 \"25-Hydroxylation of vitamin D3 in liver, Rattus norvegicus\"" . "Reactome:REACT_88533 \"25-Hydroxylation of vitamin D3 in liver, Bos taurus\"" . "Reactome:REACT_89571 \"25-Hydroxylation of vitamin D3 in liver, Taeniopygia guttata\"" . "Reactome:REACT_90307 \"25-Hydroxylation of vitamin D3 in liver, Canis familiaris\"" . "Reactome:REACT_95290 \"25-Hydroxylation of vitamin D3 in liver, Gallus gallus\"" . .