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:	T976
P-Site Sequence:	TEYENFMTETPELPS
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	T976	TEYENFMTETPELPS	100 / 9 AA	119
Phosphosite 1:	C4orf21	Q86YA3	T978	YENFMTETPELPSTC	100 / 7 AA	119
Phosphosite 2:	FN1	P02751	T617	GPVEVFITETPSQPN	75 / 8 AA	263
Phosphosite 3:	DCUN1D3	Q8IWE4	T229	DQWLNFLTENPSGIK	71 / 7 AA	34
Phosphosite 4:	Cip1 (p21)	P38936	T55	RWNFDFVTETPLEGD	71 / 7 AA	18
Phosphosite 5:	EPB41L2	O43491	S658	LKRNFMESTPEPRPN	75 / 8 AA	113
Phosphosite 6:	TMC6	Q7Z403	S462	FSEFMIQSPEAAGQE	57 / 7 AA	90
Phosphosite 7:	CXorf19	B1AK76	T66	RQVFITETPRCGKKP	83 / 6 AA	14
Phosphosite 8:	CXorf19	B1AK76	T64	KLRQVFITETPRCGK	83 / 6 AA	14
Phosphosite 9:	HERV-K_10p14 provirus Rec protein	P61578	T70	CLENTKMTQTPESML	83 / 6 AA	12
Phosphosite 10:	HERV-K_10p14 provirus Rec protein	P61578	T72	ENTKMTQTPESMLLA	83 / 6 AA	12
Phosphosite 11:	GCA	P28676	T130	AWKENFMTVDQDGSG	100 / 5 AA	24
Phosphosite 12:	FN1	P02751	T619	VEVFITETPSQPNSH	83 / 6 AA	263
Phosphosite 13:	CABIN1	Q9Y6J0	S732	KHLEFMTSIPERPAQ	71 / 7 AA	246
Phosphosite 14:	Cip1 (p21)	P38936	T57	NFDFVTETPLEGDFA	83 / 6 AA	18
Phosphosite 15:	LPAR4	Q99677	T336	RMESLFKTETPLTTK	83 / 6 AA	42
Phosphosite 16:	AKAP3	O75969	Y518	EKPENFMYDSDSWAK	57 / 7 AA	95
Phosphosite 17:	LPAR4	Q99677	T338	ESLFKTETPLTTKPS	83 / 6 AA	42
Phosphosite 18:	SERPINA2	P20848	T111	EGLNVNLTETPEAKI	83 / 6 AA	48
Phosphosite 19:	GATSL3	Q8WTX7	T45	RCKFFSLTETPEDYT	83 / 6 AA	36
Phosphosite 20:	GATS	Q8NAP1	T56	RCKFFSLTETPEDYT	83 / 6 AA	18