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Table 1
Phosphoproteomics datasets
Species	Reference	Proteins (n)^a	Sites (n)^a

Human	[34]	1,419	3,296
Mouse	[23]	1,605	3,142
Fly	[14]	991	2,080
Yeast	[35]	481	850
Plant	[22]	470	724
Zebrafish	[11]	668	759

^aCan be less than the number mentioned in the original papers, because we imposed a relatively strict set of cutoffs on phosphopeptide calls to improve the uniformity and reduce noise.
Boekhorst et al. Genome Biology 2008 9:R144 doi:10.1186/gb-2008-9-10-r144

Table 1