like the naturally occurring renal 1 alpha-hydroxylase , the pam 1 alpha-hydroxylation reaction exhibited a high affinity for 25-hydroxyvitamin d3 ( 25-oh-d3 ) and a preference for substrates containing a 25-hydroxyl group in the side chain of the sterol .
C0006657
25-hydroxyvitamin d3
C2713074
25-oh-d3