Table 2: MeHg modification sites in Keap1.

Peak no.PositionPeptide sequenceCalculated massObserved mass

1484–494LNSAECYYPER1345.51345.1
2363–380SGLAGCVVGGLLYAVGGR1649.91649.6
3151–169CVLHVMNGAVMYQIDSVVR2135.62135.1
P-1484–494
+MeHg
LNSAECYYPER
+MeHg (214)
1560.51559.6
P-2363–380
+MeHg
SGLAGCVVGGLLYAVGGR
+MeHg (216)
1863.81864.8
P-3151–169
+MeHg
CVLHVMNGAVMYQIDSVVR
+MeHg (214)
2350.62349.5