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. Author manuscript; available in PMC: 2015 Feb 11.
Published in final edited form as: Chem Commun (Camb). 2014 Mar 11;50(20):2673–2675. doi: 10.1039/c3cc49068h

Fig. 3.

Fig. 3

(A) Structures of 11–15 and their site-specific incorporation into sfGFP at its S2 position. (B) Deconvoluted ESI-MS spectra of sfGFP variants incorporated with 11–15. Their theoretical values are 27 770 Da for 11, 27 784 Da for 12, 27 798 Da for 13, 27 812 Da for 14, and 27 826 Da for 15. Compounds 13 and 14 show small signals corresponding to an N-terminal methionine on sfGFP. Compound 15 has several small signals attributed to sodium and potassium adducts.