Clinical investigation on the metabolism of vitamin B12.  I.  Studies on the microbiological bioassay of vitamin B12 in serum and urine using Euglena gracilis:  on the serum vitamin B12 concentration of normal human adults.
D001681:Biological Assay; D001826:Body Fluids; D045728:Corrinoids; D005056:Euglena gracilis; D056890:Eukaryota; D006397:Hematinics; D006801:Humans; D014805:Vitamin B 12 / Q000097:blood*
D045728:Corrinoids; D006397:Hematinics; D014805:Vitamin B 12
PROTOZOA; VITAMIN B12/in blood