title: Letter: Studies on the biosynthesis of beta-lactam antibiotics. I. Synthesis of(2RS,3S)-(4,4,4-2H3)valine.
mesh_terms: D000900:Anti-Bacterial Agents / Q000096:biosynthesis; D008722:Methods; D014316:Tritium; D014633:Valine / Q000138:chemical synthesis*; D047090:beta-Lactams / Q000096:biosynthesis
chemical_list: D000900:Anti-Bacterial Agents; D047090:beta-Lactams; D014316:Tritium; D014633:Valine