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:	T1721
P-Site Sequence:	SERLCRSTRQRAACA
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	T1721	SERLCRSTRQRAACA	100 / 9 AA	193
Phosphosite 1:	C4B	P0C0L5	T1721	SERLCRSTRQRAACA	100 / 9 AA	193
Phosphosite 2:	C4B	P0C0L5	S1720	PSERLCRSTRQRAAC	100 / 8 AA	193
Phosphosite 3:	C4A	P0C0L4	S1720	PSERLCRSTRQRAAC	100 / 8 AA	193
Phosphosite 4:	ICA1L	Q8NDH6	S116	TGKALCSSAKQRLAL	62 / 8 AA	54
Phosphosite 5:	TRIP12	Q14669	T324	LPSLRRSTRQKTTGS	66 / 9 AA	220
Phosphosite 6:	USP38	Q8NB14	T606	RCLNCRSTSQKVEAF	62 / 8 AA	117
Phosphosite 7:	TRIP12	Q14669	S323	ELPSLRRSTRQKTTG	75 / 8 AA	220
Phosphosite 8:	USP38	Q8NB14	S607	CLNCRSTSQKVEAFT	62 / 8 AA	117
Phosphosite 9:	ANTXRL	A6NF34	S551	RQNPLCHSPRQSPTS	71 / 7 AA	63
Phosphosite 10:	INSC	Q1MX18	S522	RLIELCRSPSERNSS	62 / 8 AA	63
Phosphosite 11:	C15orf53	Q8NAA6	T156	GCYLGKSTRRRACQS	66 / 9 AA	20
Phosphosite 12:	ZNF690	Q8IWY8	S613	GNESDCRSGRQWAKT	71 / 7 AA	97
Phosphosite 13:	C19orf6	Q4ZIN3	T226	FLRLSQATRQRLSIP	62 / 8 AA	68
Phosphosite 14:	SAGE1	Q9NXZ1	S711	GAGISCRSTRDLYAT	83 / 6 AA	99
Phosphosite 15:	POMT1	Q9Y6A1	S691	ISDHLCRSQLQRSIF	75 / 8 AA	85
Phosphosite 16:	SAGE1	Q9NXZ1	T712	AGISCRSTRDLYATV	83 / 6 AA	99
Phosphosite 17:	PDE8A	O60658	S146	DAEALCRSIRSSKLS	83 / 6 AA	93
Phosphosite 18:	MSL3L1	Q8N5Y2	T352	LQSLRRSTRHSANCD	66 / 9 AA	60
Phosphosite 19:	F2RL1	P55085	S363	KNALLCRSVRTVKQM	83 / 6 AA	44
Phosphosite 20:	TP53TG3	Q9ULZ0	S105	RSLIPCRSTKGRWPL	71 / 7 AA	14