Note - Blast analyses are based on comparisons of the phosphosites and the bordering four amino acids on each side of these phosphosites.

Phosphosite
Human Protein:	IL21
Human P-Site:	Y45
P-Site Sequence:	IVDQLKNYVNDLVPE
UniProt:	Q9HBE4
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	IL21	Q9HBE4	Y45	IVDQLKNYVNDLVPE	100 / 9 AA	18
Phosphosite 1:	RAPGEF5	Q92565	Y556	EHQELKSYVNHLYVI	66 / 9 AA	68
Phosphosite 2:	ATP12A	P54707	Y909	RVEWEKDYVNDLKDS	85 / 7 AA	116
Phosphosite 3:	SH3BP5	O60239	T228	QLEQLKKTVDDLQAK	66 / 9 AA	50
Phosphosite 4:	HELZ	P42694	Y73	SFLQLKNYVQADEDC	100 / 6 AA	219
Phosphosite 5:	SGOL2	Q562F6	Y889	NILELKKYVTDRKSA	62 / 8 AA	145
Phosphosite 6:	HPRT1	P00492	S104	VDFIRLKSYCNDQST	62 / 8 AA	25
Phosphosite 7:	DNAH11	Q96DT5	Y999	THLEIKNYQNDMDNM	55 / 9 AA	521
Phosphosite 8:	HPRT1	P00492	Y105	DFIRLKSYCNDQSTG	62 / 8 AA	25
Phosphosite 9:	SH3D19	Q5HYK7	Y603	EIIILKEYVNEEWAR	71 / 7 AA	87
Phosphosite 10:	TRAD	O60229	Y1943	LVQTEKDYVKDLGIV	71 / 7 AA	340
Phosphosite 11:	SGOL2	Q562F6	Y595	NILDLKKYVTDIQPS	55 / 9 AA	145
Phosphosite 12:	TIEG2	O14901	Y264	QTCSPKNYENDLPRK	85 / 7 AA	55
Phosphosite 13:	SNX29	Q8TEQ0	Y159	LKVQLKKYVGAVQML	55 / 9 AA	48
Phosphosite 14:	DNAH7	Q8WXX0	Y3850	SLKPLGSYVNDFLAR	55 / 9 AA	461
Phosphosite 15:	RUFY1	Q96T51	Y310	DVLDQKNYVEELNRH	71 / 7 AA	80
Phosphosite 16:	RUFY2	Q8WXA3	Y257	AILDQKNYVEELNRQ	71 / 7 AA	75
Phosphosite 17:	RUFY3	Q7L099	Y266	AILDQKNYVEELNRH	71 / 7 AA	53
Phosphosite 18:	Tiam2	Q8IVF5	Y1114	LVDTEKSYVKDLSCL	71 / 7 AA	193
Phosphosite 19:	CAPZA3	Q96KX2	Y128	LLCALKLYVNDHYPK	85 / 7 AA	35
Phosphosite 20:	KIAA0467	Q5T011	Y2214	AAHQLYNYVADHASS	75 / 8 AA	278