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:	S152
P-Site Sequence:	LSSRTHGSEDS____
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	S152	LSSRTHGSEDS____	100 / 8 AA	18
Phosphosite 1:	SPOCK2	Q92563	S373	TGTRTHGSPDCDDIV	75 / 8 AA	47
Phosphosite 2:	IGSF10	Q6WRI0	T2578	STASKERTHGSEQLH	100 / 6 AA	291
Phosphosite 3:	ZNF518A	Q6AHZ1	S1263	SKTKTHGSKDSETAF	75 / 8 AA	167
Phosphosite 4:	ROCK2	O75116	T635	ESERRDRTHGSEIIN	100 / 6 AA	161
Phosphosite 5:	HRC	P23327	S139	RGHRGHGSEDTEDSA	75 / 8 AA	80
Phosphosite 6:	USP35	Q9P2H5	S754	SGERTCGSEGSRSVL	75 / 8 AA	113
Phosphosite 7:	LUZP1	Q86V48	S381	TKFRGHGSEASVSKH	75 / 8 AA	120
Phosphosite 8:	Putative uncharacterized protein FLJ45340	Q6ZSN7	S176	KAAWTHGSGDGRGA_	62 / 8 AA	20
Phosphosite 9:	PPRC1	Q5VV67	T1151	SFLPTPRTQGSEDVV	83 / 6 AA	178
Phosphosite 10:	FAM5B	Q9C0B6	S712	DYPYTQGSQDSALLQ	71 / 7 AA	89
Phosphosite 11:	FAM5C	Q76B58	S695	DYPYTQGSQDSALLQ	71 / 7 AA	88
Phosphosite 12:	NEO1	Q92859	S1220	NSYRGHESEDSMSTL	75 / 8 AA	160
Phosphosite 13:	CDAN1	Q8IWY9	S29	IARSTQGSEDNAGEA	71 / 7 AA	134
Phosphosite 14:	SIX3	O95343	S293	PGCPTHGSAESPSTA	62 / 8 AA	35
Phosphosite 15:	WIPF2	Q8TF74	S351	PPYRMHGSEPPSRGK	83 / 6 AA	46
Phosphosite 16:	ZNF497	Q6ZNH5	S298	QHRRTHSSEKPFPCA	62 / 8 AA	55
Phosphosite 17:	OR4C15	Q8NGM1	T226	VILLSLRTHSSEGRW	83 / 6 AA	36
Phosphosite 18:	HRC	P23327	S221	HRHRGHGSEEDEDVS	71 / 7 AA	80
Phosphosite 19:	ZNF555	Q8NEP9	T389	SFRRHERTHGGEKPY	83 / 6 AA	73
Phosphosite 20:	OR4C45	A6NMZ5	T228	IILCFLRTHSSEGRR	83 / 6 AA	35