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. Author manuscript; available in PMC: 2020 Jul 30.
Published in final edited form as: Biochemistry. 2018 Sep 28;57(41):5996–6002. doi: 10.1021/acs.biochem.8b00835

Figure 6. Mass spectra of doubly ITAChetITFChetAYD (100µM) reacted with ThcOx and ThcOx-Ox.

Figure 6

(a) Unoxidized peptide showing an [M + H]+ of 1184.5 Da and an [M + Na]+ of 1206.5 Da. (b) Reaction with native ThcOx resulted in a mass loss of 4 Da. (c) No mass shift was seen when the peptide was incubated with ThcOx-Ox. (d) Exogenous FMN (200 μM) was unable to rescue the reaction