Table 2

Tandem mass spectrometry analysis of the acetylated peptide of Acs.

b seriesm/z*Observed m/zSequence y series m/zObserved m/zSequence
y6: 733.403SGKAcIMR
b1: 88.040 S y5: 646.371646.368 GKAcIMR
b2: 145.061145.060 SG y4: 589.350 589.349KAcIMR
b3: 315.167 315.166SGKAc y3: 419.244 419.242 IMR
b4: 428.251 428.244 SGKAcIy2: 306.160 306.157 MR
b5: 559.291 SGKAcIM y1: 175.119175.118 R
b6: 715.393SGKAcIMR
  • * Predicted fragment ion masses of SGKAcIMR with the charge on the NH2-terminal amino acid; KAc, acetyl-lysine.

  • Predicted fragment ion masses of SGKAcIMR with the charge on the COOH-terminal amino acid.