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. Author manuscript; available in PMC: 2021 Jul 30.
Published in final edited form as: J Am Soc Mass Spectrom. 2021 Mar 16;32(6):1336–1344. doi: 10.1021/jasms.0c00464

Figure 5.

Figure 5.

Identification of completely labeled ribose import binding protein RbsB. (A) MS spectrum of the completely labeled proteoform (25 TMT labels) and one underlabeled proteoform (24 TMT labels). (B) HCD MS/MS spectrum and identification of the completely labeled RbsB. The lysine on the N-terminus is labeled on both its side chain and N-terminus primary amine.