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:	IGSF21
Human P-Site:	S271
P-Site Sequence:	NIPETVVSREFPRWV
UniProt:	Q96ID5
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	IGSF21	Q96ID5	S271	NIPETVVSREFPRWV	100 / 9 AA	52
Phosphosite 1:	POGK	Q9P215	S85	MNYETVLSLEFPFPK	77 / 9 AA	69
Phosphosite 2:	MLL3	Q8NEZ4	S678	EEPETVVSREESRPP	100 / 7 AA	541
Phosphosite 3:	ZBTB32	Q9Y2Y4	S37	DTLITVGSQEFPAHS	75 / 8 AA	53
Phosphosite 4:	LDLR	P01130	S470	SSYDTVISRDIQAPD	44 / 9 AA	95
Phosphosite 5:	GluR1	P42261	S880	GENGRVVSHDFPKSM	71 / 7 AA	102
Phosphosite 6:	SETBP1	Q9Y6X0	S560	TSPVSPISREFPGTK	83 / 6 AA	170
Phosphosite 7:	IGSF21	Q96ID5	T268	TTENIPETVVSREFP	100 / 6 AA	52
Phosphosite 8:	KDM1	O60341	T746	AVPQPKETVVSRWRA	100 / 6 AA	93
Phosphosite 9:	LUZP1	Q86V48	S875	DRPETVVSRSSIIIK	100 / 6 AA	120
Phosphosite 10:	LUZP1	Q86V48	T872	PLKDRPETVVSRSSI	100 / 6 AA	120
Phosphosite 11:	KDM1	O60341	S749	QPKETVVSRWRADPW	100 / 6 AA	93
Phosphosite 12:	MLL3	Q8NEZ4	T675	QLLEEPETVVSREES	100 / 6 AA	541
Phosphosite 13:	THAP9	Q9H5L6	S18	STRDTVLSRERGLSF	71 / 7 AA	103
Phosphosite 14:	ELYS	Q8WYP5	S438	WSLESVVSRTSPHGI	66 / 9 AA	252
Phosphosite 15:	CPNE5	Q9HCH3	S395	LPPDGRVSHEFPLNG	83 / 6 AA	66
Phosphosite 16:	C10orf92	Q8IYW2	S516	EGTISSVSREFSLQM	83 / 6 AA	95
Phosphosite 17:	CNTN3	Q9P232	S111	NSLGTIVSREAKLQF	83 / 6 AA	113
Phosphosite 18:	CNTN4	Q8IWV2	S111	NSFGTIVSREAKLQF	83 / 6 AA	113
Phosphosite 19:	ANXA7	P20073	S396	RDLLSSVSREFSGYV	83 / 6 AA	53
Phosphosite 20:	SPP1	P10451	S270	SQELSKVSREFHSHE	83 / 6 AA	35