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:	S216
P-Site Sequence:	EPGTWKISARFSDGL
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	S216	EPGTWKISARFSDGL	100 / 9 AA	193
Phosphosite 1:	C4B	P0C0L5	S216	EPGTWKISARFSDGL	100 / 9 AA	193
Phosphosite 2:	C2orf80	Q0P641	S180	NATEWKSSQRFSDTQ	75 / 8 AA	22
Phosphosite 3:	C21orf118	Q96PM8	S72	EGPSWRISARAVQKG	71 / 7 AA	14
Phosphosite 4:	TSC1	Q92574	S282	YSVSHQISARFPHRS	55 / 9 AA	130
Phosphosite 5:	PPP2R2D	Q66LE6	S131	TIKLWKISERDKRAE	83 / 6 AA	52
Phosphosite 6:	PPP2R2A	P63151	S125	TIKLWKISERDKRPE	83 / 6 AA	52
Phosphosite 7:	DEPP	Q9NTK1	T86	AVSLRDITARFSGQQ	62 / 8 AA	23
Phosphosite 8:	ZMYM4	Q5VZL5	S298	QEGELKISAVFSVSG	75 / 8 AA	173
Phosphosite 9:	FAM38A	Q92508	S1385	PRDTRRISLRFRRRK	62 / 8 AA	233
Phosphosite 10:	APOL3	O95236	S315	PVTTWRISAGSGGQA	83 / 6 AA	44
Phosphosite 11:	ARHGEF1	Q92888	S513	SWFQKISSRFCSRQS	71 / 7 AA	102
Phosphosite 12:	C4B	P0C0L5	T212	PDISEPGTWKISARF	100 / 5 AA	193
Phosphosite 13:	C4A	P0C0L4	T212	PDISEPGTWKISARF	100 / 5 AA	193
Phosphosite 14:	GAL3ST1	Q99999	S188	VPLTWKLSAGDKLTE	83 / 6 AA	49
Phosphosite 15:	Putative UPF0609 protein C4orf27-like	A8MVJ9	S132	LSATWGISDRDSPDE	71 / 7 AA	40
Phosphosite 16:	ARHGAP21	Q5T5U3	S1707	DTLSRKKSARFKSDS	62 / 8 AA	217
Phosphosite 17:	APOB	P04114	S2643	LKNIKIPSRFSTPEF	71 / 7 AA	516
Phosphosite 18:	PPP6C	O00743	S208	DVDTWAISPRGAGWL	71 / 7 AA	35
Phosphosite 19:	C2orf80	Q0P641	S179	ANATEWKSSQRFSDT	71 / 7 AA	22
Phosphosite 20:	CCDC18	Q5T9S5	S1241	NHAKWKISADSQKSS	100 / 5 AA	169