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. Author manuscript; available in PMC: 2023 Jan 22.
Published in final edited form as: Cancer Lett. 2022 Mar 9;534:215613. doi: 10.1016/j.canlet.2022.215613

Table 2.

Cysteine residues in Stat3 protein that were modified by azetidine compounds and detected by MS.

Compound name Cys residue m/z Mr(expt) Mr(calc) ppm Score Expect Peptide Experimental reproducibility
H098 C328 920.3475 1838.6804 1838.6800 0.23 39 0.0002 F.VVERQPCMPM.H + 2 Oxidation (M); STAT3-H098 (C) 3 out of 3
C426 791.2959 1580.5772 1580.5687 5.38 22 0.0093 N.GGRANCDASL.I + STAT3-H098 (C) 3 out of 3
H182 C468 1121.0018 2239.9891 2239.9880 0.51 37 0.00036 H.SLPVVVISNICQMPN.A + STAT3- H182 (C) 1 out of 2
C542 711.2601 1420.5057 1420.4992 4.60 18 0.046 Y.SGCQITW.A + STAT3-H182 (C) 2 out of 2