title: [Biosynthetic studies using 13C as a tracer (author's transl)].
mesh_terms: D000085:Acetates / Q000378:metabolism; D002247:Carbon Isotopes; D005227:Fatty Acids / Q000096:biosynthesis; D007553:Isotope Labeling; D009682:Magnetic Resonance Spectroscopy; D011166:Porphyrins / Q000096:biosynthesis
chemical_list: D000085:Acetates; D002247:Carbon Isotopes; D005227:Fatty Acids; D011166:Porphyrins