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:	T261
P-Site Sequence:	SMTVDGFTDPSNSER
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	T261	SMTVDGFTDPSNSER	100 / 9 AA	48
Phosphosite 1:	Smad5	Q99717	T300	SVLVDGFTDPSNNKS	100 / 9 AA	52
Phosphosite 2:	SMAD1	Q15797	T300	SVLVDGFTDPSNNKN	100 / 9 AA	52
Phosphosite 3:	Smad2	Q15796	T303	SLTVDGFTDPSNSER	100 / 9 AA	52
Phosphosite 4:	Smad8	O15198	T302	SVLIDGFTDPSNNRN	88 / 9 AA	52
Phosphosite 5:	REV1	Q9UBZ9	Y59	VAIYVNGYTDPSAEE	75 / 8 AA	138
Phosphosite 6:	SLCO2A1	Q92959	S199	ISYVDDFSEPSNSPL	66 / 9 AA	70
Phosphosite 7:	Smad4	Q13485	Y353	PIVTVDGYVDPSGGD	75 / 8 AA	60
Phosphosite 8:	FLJ40759	A6NFN9	T353	TVMVDGFTKPKMTSK	85 / 7 AA	48
Phosphosite 9:	PRDM16	Q9HAZ2	S350	VKVFTDPSNLQRHIR	100 / 6 AA	140
Phosphosite 10:	EVI1	Q03112	S144	AKVFTDPSNLQRHIR	100 / 6 AA	118
Phosphosite 11:	Smad2	Q15796	S306	VDGFTDPSNSERFCL	100 / 6 AA	52
Phosphosite 12:	SMAD3	P84022	S264	VDGFTDPSNSERFCL	100 / 6 AA	48
Phosphosite 13:	Smad5	Q99717	S303	VDGFTDPSNNKSRFC	100 / 6 AA	52
Phosphosite 14:	TEX15	Q9BXT5	T880	QNSESLFTEPSNVTT	83 / 6 AA	315
Phosphosite 15:	PPM1E	Q8WY54	T561	DGRVDSFTDRTSLSP	55 / 9 AA	85
Phosphosite 16:	TEX15	Q9BXT5	S883	ESLFTEPSNVTTIDD	83 / 6 AA	315
Phosphosite 17:	GCN1L1	Q92616	T1586	PVLLDALTDPSRKTQ	62 / 8 AA	293
Phosphosite 18:	EMR1	Q14246	S529	GEKKDGFSDPIIYTL	83 / 6 AA	98
Phosphosite 19:	NUP160	Q12769	T196	DIGKVDFTDPCNYQL	83 / 6 AA	162
Phosphosite 20:	UNC13D	Q70J99	S132	GKDVSGFSDPYCLLG	71 / 7 AA	123