Table 1.

Lysine- and Arginine-Methylated Peptides

peptidea	protein	accession number	amino acid residues	calcd mass (m/z)	obsd mass (m/z)	error (ppm)	ITRAQ ratio
Lysine-Methylated Peptides
VNK#PPYPK	plastin-3	IPI00210234	442–449	1258.777	1258.719	−46	1.8
GSFK#YAWVLDK	elongation factor 1-α2	IPI00325281	52–62	1629.925	1629.927	1	1.4
GDSSGSSK#SIGR	R3H domain isoform 3	IPI00763599	391–402	1309.683	1309.736	40	1.2
GAKOLPITSLEK	complement component 1, s subunit	IPI00199519	590–600	1458.914	1458.863	−35	0.79
VLSSLTK#K	transcription initiation factor TFIID, subunit 5	IPI00361559	279–286	1191.792	1191.826	28	0.79
TSNIKLDKOIMK	ρ-associated protein kinase 1, isoform 1	IPI00211045	455–465	1608.960	1608.929	−19	0.77
SK#YDEEKGLR	early endosome antigen 1	IPI00768104	177–186	1396.756	1396.691	−46	0.76
ALPFWNEEIAPK#IK	phosphoglycerate mutase 2	IPI00231506	162–175	1972.152	1972.239	44	0.71
DVNKOIK#VK	discs large homologue 7	IPI00766460	703–710	1273.845	1273.889	34	0.70
MPEAEKOR	PPAR-δ protein	IPI00325169	147–153	1018.547	1018.505	−42	0.69
Arginine-Methylated Peptides
FLQROYAILTK	myosin 1E	IPI00207988	632–641	1554.962	1554.946	−10	3.9
LER#MR#LVR	nephrocystin 4 orthologue	IPI00764323	848–855	1288.801	1288.843	33	1.5
SRAHVPGROGR	protein phosphatase 1 regulatory subunit 3D	IPI00359691	53–62	1250.731	1250.708	−18	1.4
EQPCVCLQER#AR	EGF-like domain-containing protein 4	IPI00365661	2405–2416	1695.788	1695.828	23	1.3
KER#QLILK	centrosome-associated protein 350	IPI00207361	1748–1755	1488.001	1487.982	−12	0.57

^aKey: O, monomethylated residue; #, dimethylated residue.