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Table 3 Negative ions arising from MS/MS analysis of the m/z = 1141 pyoverdine species

From: Characterization of pyoverdine and achromobactin in Pseudomonas syringae pv. phaseolicola 1448a

Peak number

Mass

Composition of ion

1

357.13

B ion: CHR

2

458.24

B ion: CHR_K

3

616.28

B ion: CHR_K_OH-D

4

718.32

B ion: CHR_K_OH-D_T

5

818.39

B ion: CHR_K_OH-D_T_T

6

905.42

B ion: CHR_K_OH-D_T_T_S

7

1036.41

B ion: CHR_K_OH-D_T_T_S_OH-D

Y1

1067.48

Y ion resulting from loss of chromophore acyl group

  1. Fragmentation of the m/z = 1141 pyoverdine species resulted in identification of the following negative ions as shown in Figure 2B. Peaks 1-7 match the expected pattern of B-ions previously reported for fragmentation of other P. syringae linear pyoverdine molecules. Y1 has the expected mass for the Y ion resulting from loss of the acyl group of the chromophore. CHR = chromophore, OH-D = hydroxyaspartate, all other amino acids indicated by standard one letter code.