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:	C4A
Human P-Site:	S696
P-Site Sequence:	EKLGQYASPTAKRCC
UniProt:	P0C0L4
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	C4A	P0C0L4	S696	EKLGQYASPTAKRCC	100 / 9 AA	193
Phosphosite 1:	C4B	P0C0L5	S696	EKLGQYASPTAKRCC	100 / 9 AA	193
Phosphosite 2:	C4B	P0C0L5	Y694	INEKLGQYASPTAKR	100 / 7 AA	193
Phosphosite 3:	C4A	P0C0L4	Y694	INEKLGQYASPTAKR	100 / 7 AA	193
Phosphosite 4:	ODF3L2	Q3SX64	S209	PGPGQYDSPDANTYR	66 / 9 AA	31
Phosphosite 5:	SPTAN1	Q13813	S1413	LAHGHYASPEIKQKL	66 / 9 AA	285
Phosphosite 6:	HCN1	O60741	S721	ARTFHYASPTASQLS	85 / 7 AA	99
Phosphosite 7:	ZNF646	O15015	S1327	SHETGQYSCPTCPKT	62 / 8 AA	201
Phosphosite 8:	ZNF646	O15015	Y1326	RSHETGQYSCPTCPK	71 / 7 AA	201
Phosphosite 9:	MYCBP2	O75592	S2353	FEELRFASPTPKRPS	62 / 8 AA	510
Phosphosite 10:	SGPL1	O95470	S389	WQGGIYASPTIAGSR	85 / 7 AA	64
Phosphosite 11:	SP4	Q02446	S349	ADTGQYASTSASSSE	75 / 8 AA	82
Phosphosite 12:	XKR6	Q5GH73	T617	INILQYVTPTAVGIR	71 / 7 AA	72
Phosphosite 13:	HCN1	O60741	T723	TFHYASPTASQLSLM	100 / 6 AA	99
Phosphosite 14:	RAI17	Q9ULJ6	Y459	SQPSSGQYPPPTVNM	71 / 7 AA	115
Phosphosite 15:	SPTAN1	Q13813	Y1411	QLLAHGHYASPEIKQ	83 / 6 AA	285
Phosphosite 16:	C16orf42	Q9UJK0	S107	PVGKQYASPADRQLV	62 / 8 AA	34
Phosphosite 17:	HCN1	O60741	Y719	LAARTFHYASPTASQ	83 / 6 AA	99
Phosphosite 18:	SGPL1	O95470	Y387	TDWQGGIYASPTIAG	85 / 7 AA	64
Phosphosite 19:	WDFY4	Q6ZS81	S39	PHGGQSSSPTALWDM	75 / 8 AA	354
Phosphosite 20:	MYCBP2	O75592	T2355	ELRFASPTPKRPSEN	71 / 7 AA	510