Protein methylation, catalyzed by highly specific methyltransferase enzymes, is a relatively common post-translational modification and plays an important role in various biological processes. Trimethylation occurs most frequently at lysine residues. Lit.



Type
Incomplete
pKa1
None
pKa2
None
pKa3
None
NativeCharge
Loss
H3
Gain
C3H9
Deltamass
Monoisotopic
42.046950192426
Average
42.0798522136743
UVSpec
λ
/ nm 		ε
/ M-1 cm-1
214 0
240 0
245 0
250 0
255 0
260 0
265 0
270 0
272 0
274 0
276 0
278 0
280 0
282 0
284 0
286 0
288 0
290 0
292 0
294 0
296 0
298 0
300 0
302 0
304 0
306 0
308 0
310 0
312 0
314 0
316 0
318 0
320 0
H
AA
K, ^
Pattern
[K]