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:	C4orf21
Human P-Site:	S519
P-Site Sequence:	SLNSIHESLSNVTQP
UniProt:	Q86YA3
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	C4orf21	Q86YA3	S519	SLNSIHESLSNVTQP	100 / 9 AA	119
Phosphosite 1:	C4orf21	Q86YA3	S521	NSIHESLSNVTQPFL	100 / 7 AA	119
Phosphosite 2:	FAM81B	Q96LP2	S416	GFKSIHDSLSSLQQI	66 / 9 AA	48
Phosphosite 3:	KIF9	Q9HAQ2	S375	QELAIHDSLTNRTFV	62 / 8 AA	90
Phosphosite 4:	ATP9B	O43861	S328	SDPPIHESLSIENTL	85 / 7 AA	129
Phosphosite 5:	FAM75-like protein FLJ43859	Q6ZUB0	S706	LPRRIHESLSLLRPQ	85 / 7 AA	102
Phosphosite 6:	Protein FAM75D1	Q6ZQQ2	S709	LPRRIHESLSLLRPQ	85 / 7 AA	176
Phosphosite 7:	Putative FAM75-like protein FLJ44082	P0C874	S706	LPRRIHESLSLLRPQ	85 / 7 AA	102
Phosphosite 8:	MARK3	P27448	S371	SQEEIQESLSKMKYD	62 / 8 AA	87
Phosphosite 9:	TCP11	Q8WWU5	S391	VSQEIHQSLKNMGLV	62 / 8 AA	56
Phosphosite 10:	PPM1D	O15297	S489	LTLRIHDSLNNSLPI	71 / 7 AA	67
Phosphosite 11:	DNAH14	Q0VDD8	S3177	MSSSIWESLSKNLKD	75 / 8 AA	400
Phosphosite 12:	CASC5	Q8NG31	S576	SKERIQQSLSNPLSI	71 / 7 AA	265
Phosphosite 13:	NPHP3	Q7Z494	S758	VLHSIRESMANDVDK	62 / 8 AA	151
Phosphosite 14:	DPP9	Q86TI2	S230	TFCHQGLSNVLDDPK	71 / 7 AA	98
Phosphosite 15:	RPAP3	Q9H6T3	S114	KDDSTHESLSQESES	85 / 7 AA	76
Phosphosite 16:	GOLGA3	Q08378	S1456	HALTVHESLSSWTPL	62 / 8 AA	167
Phosphosite 17:	RDH10	Q8IZV5	S223	GVVGFHESLSHELKA	62 / 8 AA	38
Phosphosite 18:	CCDC144C	Q8IYA2	S1099	EEVKVRESLSNELSR	71 / 7 AA	143
Phosphosite 19:	CCDC144A	A2RUR9	S1289	EEVKVRESLSNELSR	71 / 7 AA	165
Phosphosite 20:	LRRC8C	Q8TDW0	S69	AQNHSSLSNVSQAVA	85 / 7 AA	92