title: Biological activity of 1beta-hydroxy-vitamin D3. Implications for the steric structure of the active form of vitamin D.
mesh_terms: D000818:Animals; D001681:Biological Assay; D002645:Chickens; D006887:Hydroxycholecalciferols / Q000097:blood / Q000627:therapeutic use; D007536:Isomerism; D008968:Molecular Conformation; D013329:Structure-Activity Relationship; D014808:Vitamin D Deficiency / Q000188:drug therapy
chemical_list: D006887:Hydroxycholecalciferols