Table 1.

The statistics for data we collected from major PTM database.

Species	Modification	Residues	Number of sites	Number of proteins
Human	Phosphorylation	S	115792	13575
		T	51802	13575
	O-GlcNAcylation	S	250	118
		T	173	84
	O-GlcNAc/Phos	S	103	55
		T	29	23
Mice	Phosphorylation	S	55993	10309
		T	16978	6764
	O-GlcNAcylation	S	484	248
		T	386	203
	O-GlcNAc/Phos	S	116	76
		T	30	27