title: Origin of the D-1-aminopropan-2-ol fragment of vitamin B12.
mesh_terms: D000605:Amino Alcohols / Q000096:biosynthesis*; D002247:Carbon Isotopes; D002855:Chromatography, Thin Layer; D013302:Streptomyces / Q000378:metabolism; D013912:Threonine / Q000378:metabolism; D014805:Vitamin B 12 / Q000096:biosynthesis*
chemical_list: D000605:Amino Alcohols; D002247:Carbon Isotopes; D013912:Threonine; D014805:Vitamin B 12