title: Measurement of tissue vitamin B12 by radioisotopic competitive inhibition assay and quantitation of tissue cobalamin fractions.
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D003037:Cobalt Radioisotopes; D011869:Radioligand Assay; D014805:Vitamin B 12 / Q000032:analysis*
chemical_list: D003037:Cobalt Radioisotopes; D014805:Vitamin B 12