administration of 1,25 ( oh ) 2d3 to vitamin d-deficient chicks abolishes renal 25 ( oh ) d3 ( 25-hydroxycholecalciferol ) 1-hydroxylase activity and induces the appearance of 25 ( oh ) d3 24-hydroxylase activity .
C0042870
vitamin d-deficient
C2713074
25 ( oh ) d3