Table I.

Identification of products from incubation of GA 2-oxidase with C19-GAs

SubstrateProductMass Spectra of Products
m/z (% relative abundance)
[2H2]GA20 GA29 M+508(100), 493(8), 479(5), 449(7), 391(8), 377(9),
 305(21), 237(6), 209(33), 169(14)
GA29-catabolite1-a M+520(100), 477(89), 447(7), 431(32), 311(10)
[2H4]GA9 GA51 M+422(13), 407(11), 390(35), 374(9), 332(45),
 300(31), 289(93), 288(95), 272(55), 24?(37),
 229(100), 228(92), 202(22), 184(32)
GA51-catabolite1-a M+434(100), 419(4), 390(9), 375(13), 357(9),
 343(3), 315(35), 285(7), 269(12), 244(10), 225(3)
[2H2]GA1 GA8 M+596(100), 581(7), 538(6), 506(3), 450(16),
 381(7), 379(7), 331(3), 313(5), 283(5), 240(18),
 209(20)
[2H2]GA4 GA34 M+508(100), 476(30), 461(2), 388(5), 376(7),
 357(10), 315(10), 290(13)
  • F1-a As the trimethylsilyl enol.