the 1,25- ( oh ) 2d3 binding macromolecule in cytosol preparations from both vehicle- and retinoic acid-treated cells had a sedimentation coefficient of 3.2 s and binding specificities for vitamin d3 metabolites in the order : 1,25- ( oh ) 2d3 greater than 25- ( oh ) -d3 greater than 24,25- ( oh ) 2d3 .
C1383501
cytosol
C0007634
cells