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:	Y399
P-Site Sequence:	CSCEDDGYPALDLDA
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	Y399	CSCEDDGYPALDLDA	100 / 9 AA	59
Phosphosite 1:	CCPG1	Q9ULG6	Y73	VLMEETAYPALEETS	55 / 9 AA	87
Phosphosite 2:	WWC1	Q8IX03	Y882	ASPDMDGYPALKVDK	100 / 6 AA	125
Phosphosite 3:	NAV2	Q8IVL1	Y1202	AQNQDDGYLALSSRT	75 / 8 AA	268
Phosphosite 4:	MCR	P08235	Y574	SSRRSDGYPVLEYIP	71 / 7 AA	107
Phosphosite 5:	WBP11	Q9Y2W2	Y258	STSEDDGYPEDMDQD	100 / 6 AA	70
Phosphosite 6:	MIB1	Q86YT6	Y633	DEKKDDGYTALHLAA	85 / 7 AA	110
Phosphosite 7:	PTTG3	Q9NZH4	Y111	VPASDDGYPEIEKLF	62 / 8 AA	22
Phosphosite 8:	SENP2	Q9HC62	Y432	ERNKKQGYPALHVFS	55 / 9 AA	68
Phosphosite 9:	C4orf41	Q7Z392	Y819	TELCDESYPALLTDI	71 / 7 AA	129
Phosphosite 10:	C4orf41	Q7Z392	S818	GTELCDESYPALLTD	71 / 7 AA	129
Phosphosite 11:	ARAP3	Q8WWN8	Y247	EAREDAGYASLELPG	55 / 9 AA	170
Phosphosite 12:	GBAS	O75323	Y134	LWRYEGGYPALTEVM	71 / 7 AA	34
Phosphosite 13:	PHTF2	Q8N3S3	Y277	STETDNGYVSLDGKK	62 / 8 AA	89
Phosphosite 14:	CLCN4	P51793	Y581	AHIHLNGYPFLDVKD	71 / 7 AA	85
Phosphosite 15:	KPNB3	O00410	Y78	SSAFDEVYPALPSDV	71 / 7 AA	124
Phosphosite 16:	COL2A1	P02458	Y292	GVKGHRGYPGLDGAK	83 / 6 AA	142
Phosphosite 17:	TSC21	Q96LM6	Y68	NPKLTDGYPAFKRPH	71 / 7 AA	21
Phosphosite 18:	PLEKHG6	Q3KR16	Y43	GRLYPRGYPVLDPSR	83 / 6 AA	89
Phosphosite 19:	COL4A6	Q14031	Y141	GFPGPDGYPGLLGPP	83 / 6 AA	164
Phosphosite 20:	Thsd4	Q6ZMP0	Y253	PLTHDQGYPAASSLF	83 / 6 AA	112