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:	SMAD3
Human P-Site:	T66
P-Site Sequence:	NVNTKCITIPRSLDG
UniProt:	P84022
Intern. Prot. ID:	IPI00024305

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	SMAD3	P84022	T66	NVNTKCITIPRSLDG	100 / 9 AA	48
Phosphosite 1:	Smad5	Q99717	T67	GQPSKCVTIPRSLDG	77 / 9 AA	52
Phosphosite 2:	Smad8	O15198	T70	GQPSKCVTIPRSLDG	77 / 9 AA	52
Phosphosite 3:	SMAD1	Q15797	T66	GQPSNCVTIPRSLDG	66 / 9 AA	52
Phosphosite 4:	Smad4	Q13485	T73	AHPSKCVTIQRTLDG	55 / 9 AA	60
Phosphosite 5:	IBTK	Q9P2D0	T327	PNGEKCVTAPRQVSA	71 / 7 AA	151
Phosphosite 6:	TCF19	Q9Y242	T135	PQDFAAITIPRSRGE	100 / 6 AA	37
Phosphosite 7:	CTNNAL1	Q9UBT7	T691	LKVDKCITKTRSMMA	75 / 8 AA	82
Phosphosite 8:	USP18	Q9UMW8	T87	TRILKRITVPRGADE	62 / 8 AA	43
Phosphosite 9:	USP41	Q3LFD5	T87	ARILKRITVPRGADE	62 / 8 AA	41
Phosphosite 10:	TECTA	O75443	T1228	WKTFLSITVPRSMQN	71 / 7 AA	240
Phosphosite 11:	TrpC5	Q9UL62	T167	LLVQKRVTIPRPHQI	62 / 8 AA	111
Phosphosite 12:	HECW1	Q76N89	T62	GGPHDGVTIPRSTSD	83 / 6 AA	180
Phosphosite 13:	RGS3	P49796	T301	NGKKLKITIPRGKDG	83 / 6 AA	132
Phosphosite 14:	DISP1	Q96F81	T412	RKDQLKCTNVPRKCT	57 / 7 AA	170
Phosphosite 15:	MUC2	Q02817	T1398	PMDKCITTPSPPTTT	62 / 8 AA	540
Phosphosite 16:	ADAMTS12	P58397	T533	CMAGKCITVGKKPES	57 / 7 AA	178
Phosphosite 17:	KNL2	Q6P0N0	T352	ATPRLHITIPRRSKR	83 / 6 AA	129
Phosphosite 18:	CASP8AP2	Q9UKL3	T968	ADVRKSKTIPRRGKS	71 / 7 AA	223
Phosphosite 19:	KIAA1430	Q9P2B7	S414	SKSTIPRSADHPPKL	100 / 5 AA	59
Phosphosite 20:	HORMAD2	Q8N7B1	T11	AQLSHCITIHKASKE	57 / 7 AA	35