title: 1,25-dihydroxyvitamin D microassay employing radioreceptor techniques.
mesh_terms: D000818:Animals; D002117:Calcitriol / Q000097:blood*; D002417:Cattle; D002853:Chromatography, Liquid; D004872:Ergocalciferols / Q000031:analogs & derivatives* / Q000097:blood; D006801:Humans; D008832:Microchemistry / Q000379:methods; D011869:Radioligand Assay / Q000379:methods*; D018167:Receptors, Calcitriol; D011987:Receptors, Steroid / Q000302:isolation & purification / Q000378:metabolism; D013950:Thymus Gland / Q000032:analysis
chemical_list: D004872:Ergocalciferols; D018167:Receptors, Calcitriol; D011987:Receptors, Steroid; C003564:1,25-dihydroxyergocalciferol; D002117:Calcitriol