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:	S20
P-Site Sequence:	LGTLVHKSSSQGQDR
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	S20	LGTLVHKSSSQGQDR	100 / 9 AA	18
Phosphosite 1:	IL21	Q9HBE4	S21	GTLVHKSSSQGQDRH	100 / 8 AA	18
Phosphosite 2:	Septin-11	Q9NVA2	S35	PDQLVNKSTSQGFCF	77 / 9 AA	49
Phosphosite 3:	UTRN	P46939	S1571	ETELVQKSTSEGLLG	66 / 9 AA	394
Phosphosite 4:	SEPT6	Q14141	S36	PDQLVNKSVSQGFCF	77 / 9 AA	50
Phosphosite 5:	ZIC1	Q15915	S387	HMKVHESSSQGSQPS	87 / 8 AA	48
Phosphosite 6:	IL21	Q9HBE4	S22	TLVHKSSSQGQDRHM	100 / 7 AA	18
Phosphosite 7:	ZIC1	Q15915	S386	KHMKVHESSSQGSQP	87 / 8 AA	48
Phosphosite 8:	Zic2	O95409	S418	HMKVHESSPQGSESS	75 / 8 AA	55
Phosphosite 9:	DMTF1	Q9Y222	S516	GTYLLQTSSSQGLPL	66 / 9 AA	84
Phosphosite 10:	Zic2	O95409	S417	KHMKVHESSPQGSES	75 / 8 AA	55
Phosphosite 11:	GPR87	Q9BY21	S237	SRYIHKSSRQFISQS	71 / 7 AA	41
Phosphosite 12:	OXTR	P30559	S377	SFVLSHRSSSQRSCS	75 / 8 AA	43
Phosphosite 13:	GPR87	Q9BY21	S236	ISRYIHKSSRQFISQ	71 / 7 AA	41
Phosphosite 14:	CXorf48	Q8WUE5	S242	SITPVHKSSSGFQDD	100 / 6 AA	29
Phosphosite 15:	GATAD2A	Q86YP4	S606	PSLAVHKSSSAVDRQ	100 / 6 AA	68
Phosphosite 16:	KATNA1	O75449	S140	TVRVHRSSAQNVHND	71 / 7 AA	56
Phosphosite 17:	CATSPER4	Q7RTX7	S459	SMEKVHDSSSQILLK	85 / 7 AA	54
Phosphosite 18:	TSC22D4	Q9Y3Q8	S279	DASLVHKSPDPFGAV	62 / 8 AA	41
Phosphosite 19:	DHX9	Q08211	S1025	RNALIHKSSVNCPFS	83 / 6 AA	141
Phosphosite 20:	ZIC1	Q15915	S388	MKVHESSSQGSQPSP	85 / 7 AA	48