to clarify whether extracellular ca2+ modulates renal 25-hydroxyvitamin d3 [ 25 ( oh ) d3 ] -1 alpha-hydroxylase , thyroparathyroidectomized rats were infused with 15 mm cacl2 , 20 mm egta , and/or 2.5 u/h parathyroid hormone ( pth ) , and blood ca2+ , serum 1,25-dihydroxyvitamin d [ 1,25 ( oh ) 2d ] , and renal 1 alpha-hydroxylase activity were determined .
C0006657
25-hydroxyvitamin d3
C2713074
25 ( oh ) d3