
Keywords: Post-translational modification; Protein methylation; Mass spectrometry; Label-free; 1meK, 2meK and 3meK; Náµ;-(methyl)-, Náµ;-(dimethyl)-, and Náµ;-(trimethyl)-L-lysine, respectively; 1meR; NG-Methyl-L-arginine; ADMA; NG,NG-Dimethyl-L-arginine; LC-MS/