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:	IL-21R
Human P-Site:	Y519
P-Site Sequence:	DEGPPRSYLRQWVVI
UniProt:	Q9HBE5
Intern. Prot. ID:	IPI00034249

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	IL-21R	Q9HBE5	Y519	DEGPPRSYLRQWVVI	100 / 9 AA	59
Phosphosite 1:	IL-21R	Q9HBE5	S518	GDEGPPRSYLRQWVV	100 / 8 AA	59
Phosphosite 2:	VPS13B	Q7Z7G8	Y2533	SFREPHMYLRQWNNG	75 / 8 AA	449
Phosphosite 3:	ZNF26	P17031	Y145	NSAPSRSYLRKNPDK	75 / 8 AA	61
Phosphosite 4:	ZNF26	P17031	S144	QNSAPSRSYLRKNPD	75 / 8 AA	61
Phosphosite 5:	LARS2	Q15031	Y237	GAKVEQKYLRQWFIK	71 / 7 AA	102
Phosphosite 6:	NRSN1	Q8IZ57	Y29	QRYGVRSYLHQFYED	71 / 7 AA	21
Phosphosite 7:	BGLAP	P02818	Y52	VVKRPRRYLYQWLGA	75 / 8 AA	11
Phosphosite 8:	Plk2	Q9NYY3	Y601	DIRRPRLYLLQWLKS	75 / 8 AA	78
Phosphosite 9:	TBC1D19	Q8N5T2	Y344	SASPPKSYIRGKLGL	71 / 7 AA	60
Phosphosite 10:	LRTOMT	Q8WZ04	Y221	LAHRPRCYLRDLQLL	62 / 8 AA	32
Phosphosite 11:	TBC1D19	Q8N5T2	S343	NSASPPKSYIRGKLG	71 / 7 AA	60
Phosphosite 12:	C6orf227	Q6ZUF6	T72	GPRPPRSTLRMMETK	75 / 8 AA	21
Phosphosite 13:	TIMELESS	Q9UNS1	S497	DERCQPRSFLRDLVE	71 / 7 AA	139
Phosphosite 14:	STAT5B	P51692	Y33	FPIEVRHYLSQWIES	71 / 7 AA	90
Phosphosite 15:	PNMT	P11086	Y35	QRFEPRAYLRNNYAP	83 / 6 AA	31
Phosphosite 16:	C6orf227	Q6ZUF6	S71	PGPRPPRSTLRMMET	75 / 8 AA	21
Phosphosite 17:	RAB20	Q9NX57	Y42	STVGGAFYLKQWRSY	80 / 5 AA	26
Phosphosite 18:	RAPGEF4	Q8WZA2	Y986	NHQDVRSYVRQLNVI	71 / 7 AA	116
Phosphosite 19:	ARHGEF10	O15013	S297	CKNGIPRSFLRSNHK	83 / 6 AA	152
Phosphosite 20:	KMO	O15229	S449	IHYMSPRSFLRLRRP	71 / 7 AA	56