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. Author manuscript; available in PMC: 2020 Dec 2.
Published in final edited form as: J Am Soc Mass Spectrom. 2019 Dec 2;30(12):2561–2570. doi: 10.1007/s13361-019-02341-0

Figure 4.

Figure 4.

Phosphorylation site mapping at the C-terminus and in the middle region by CID and ECD. a) CID fragment ion mapping at the C-terminus. b) Representative fragment ions from CID experiment. A phosphorylation site was localized at Ser358 or Thr368. c) CID and ECD fragment ion mapping for the middle sequence of PKA C-subunit. d) Representative fragment ions from the CID and ECD experiments. A phosphorylation site was located at Thr[215-224]Tyr.