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Figure 2 | BMC Research Notes

Figure 2

From: Characterisation of a natural variant of the γ-butyrolactone signalling receptor

Figure 2

MALDI-TOF peptide mass fingerprint analysis of S. coelicolor strains M145 and M600 protein extracts. A. Identification of ScbR spots 1 and 2 by mass spectrometry after tryptic and chymotryptic digest. Data from the chymotryptic digests are given in brackets. B. C. Detail of the 1020 Da to 1090 Da mass range showing three extra peptides in ScbRM600 (spot 2 in A) (at 1041.486, 1045.492 and 1073.480 Da, marked with circles). The extra peak at 1041.486 Da was identified as RSWHETLL by Q-TOF mass spectrometry, and the other peaks are believed to correspond to the same peptide but with the tryptophan modified to kyneurenine (1045.492 Da) and formylkyneurenine (1073.480 Da).

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