title: Enzymatic synthesis of radioactive (-)-carnitine from gamma-butyrobetaine prepared by the methylation of gamma-aminobutyric acid.
mesh_terms: D001622:Betaine / Q000031:analogs & derivatives*; D002331:Carnitine; D055598:Chemical Phenomena; D002621:Chemistry; D004355:Drug Stability; D007553:Isotope Labeling / Q000379:methods*; D008745:Methylation; D014316:Tritium; D005680:gamma-Aminobutyric Acid
chemical_list: D014316:Tritium; D001622:Betaine; C002889:gamma-butyrobetaine; D005680:gamma-Aminobutyric Acid; D002331:Carnitine