Repair of DNA Alkylation Damage by the Escherichia coli Adaptive Response Protein AlkB as Studied by ESI-TOF Mass Spectrometry

Figure 4

ESI-TOF analysis of 16 mer reactants and products from the in vitro incubation reactions of eA and eC lesions with the AlkB protein. Data represent the −4 charge envelopes; multiple ion mass peaks associated with each envelope reflect mostly the number of ¹³C atoms in each −4 charged packet. The monoisotopic peak (all ¹²C, ¹⁴N, etc.) value is labeled above each peak envelope. (a) eA + AlkB; (b) eC + AlkB.

(a)

(b)