Table 2.

A summary of the phosphopeptide dataset reported in this study

Category	No. of examples
No. of unique phosphorylation sites	1,435
Novel phosphorylation sites identified	1,141
No. of unique phosphorylated proteins	500
Phosphopeptides with 1, 2, 3, or 4 phosphorylation sites	868; 374; 93; 24
Phosphorylated (serine:threonine:tyrosine) residues	1,096:266:73
Phosphopeptides identified by both CID and ETD	129
Protein with the most phosphorylation sites identified: SRm300 (serine/arginine repetitive matrix 2)	119 total (71 novel, 48 known)