title: Preparation of radioactive epsilon-N-methylated lysines not involving elaborate organic synthesis.
mesh_terms: D002250:Carbon Radioisotopes; D055598:Chemical Phenomena; D002621:Chemistry; D005557:Formaldehyde / Q000378:metabolism; D007553:Isotope Labeling / Q000379:methods; D008239:Lysine / Q000031:analogs & derivatives* / Q000096:biosynthesis; D008745:Methylation; D009492:Neurospora crassa / Q000378:metabolism
chemical_list: D002250:Carbon Radioisotopes; D005557:Formaldehyde; D008239:Lysine