an assay procedure capable of determining 25 ( oh ) d2 ( 25-hydroxyvitamin d2 ) , 25 ( oh ) d3 ( 25-hydroxyvitamin d3 ) and total 24,25 ( oh ) 2d ( 24,25-dihydroxyvitamin d ) in a single 2-5 ml sample of human serum is described .
C2713074
25 ( oh ) d3
C0006657
25-hydroxyvitamin d3