003610000a22001570004500020001500000060000800015082002000023100001700043245001600060260002900076260000900105300000800114490003000122490002600152650002500178  a0121819434  a100  a574.1925 MET.43  aHash, John H  aAntibiotics  aNew York, Academic press  c1975  a837  a43cMethods in enzymology  aMethods in enzymology  aAntibiotics/ Enzymes