bovine parathyroid hormone stimulated the 1- and reduced the 24-hydroxylase in 6 h , but this only occurred in cultures either previously treated with 1,25 ( oh ) 2d3 and egta to lower ca to 0.8 mm or in cultures grown in the presence of 25-hydroxyvitamin d3 ( 25 ( oh ) d3 ) .
C0006657
25-hydroxyvitamin d3
C2713074
25 ( oh ) d3