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:	S135
P-Site Sequence:	EFLERFKSLLQKMIH
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	S135	EFLERFKSLLQKMIH	100 / 9 AA	18
Phosphosite 1:	RNF187	Q5TA31	S104	DPTERFRSLLQAVSE	87 / 8 AA	15
Phosphosite 2:	CASP8AP2	Q9UKL3	S1316	QMGEIFKSLLQGSDL	87 / 8 AA	223
Phosphosite 3:	ERBB2IP	Q96RT1	S704	QEDENFNSLLQNGDI	66 / 9 AA	158
Phosphosite 4:	DMXL2	Q8TDJ6	S2146	EHAERRKSWLQKNQD	77 / 9 AA	340
Phosphosite 5:	OPHN1	O60890	S143	KDGERFYSLLDRHLH	66 / 9 AA	92
Phosphosite 6:	FLJ12707	Q9H9C1	S177	CSLERFRSLQDKLQL	66 / 9 AA	57
Phosphosite 7:	ZNF294	O94822	S253	SLEEKFKSLLSQNKF	85 / 7 AA	201
Phosphosite 8:	TAO1	Q7L7X3	S866	ERTERIRSLLERQAR	55 / 9 AA	116
Phosphosite 9:	PI4KAP1	Q8N8J0	S65	DQVEIFSSLLQRSMS	66 / 9 AA	29
Phosphosite 10:	PI4KA	P42356	S1264	DQVEIFSSLLQRSMS	66 / 9 AA	231
Phosphosite 11:	PI4KAP2	A4QPH2	S65	DQVEIFSSLLQRSMS	66 / 9 AA	67
Phosphosite 12:	STAG3	Q9UJ98	S282	RAPERLESLLEKRKE	66 / 9 AA	139
Phosphosite 13:	RAB9B	Q9NP90	S71	AGQERFKSLRTPFYR	100 / 6 AA	23
Phosphosite 14:	STAG3L4	Q8TBR4	S141	RAPERLESLLEKHKE	66 / 9 AA	17
Phosphosite 15:	TCF20	Q9UGU0	S751	GRNEKFPSLLQEVLQ	75 / 8 AA	212
Phosphosite 16:	HES3	Q5TGS1	S18	VSLEQLKSLLEKHYS	66 / 9 AA	20
Phosphosite 17:	SMG6	Q86US8	S687	EGSDFFDSLLQKLQV	66 / 9 AA	160
Phosphosite 18:	OPHN1	O60890	Y142	EKDGERFYSLLDRHL	75 / 8 AA	92
Phosphosite 19:	RAB6B	Q9NRW1	S77	AGQERFRSLIPSYIR	62 / 8 AA	23
Phosphosite 20:	RAB6A	P20340	S77	AGQERFRSLIPSYIR	62 / 8 AA	24