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:	Smad4
Human P-Site:	S138
P-Site Sequence:	YHYERVVSPGIDLSG
UniProt:	Q13485
Intern. Prot. ID:	IPI00013404

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	Smad4	Q13485	S138	YHYERVVSPGIDLSG	100 / 9 AA	60
Phosphosite 1:	TNRC18	O15417	S1857	GARERALSPGLEESG	55 / 9 AA	315
Phosphosite 2:	C6orf152	Q86VQ0	S7	_MGERAGSPGTDQER	66 / 9 AA	81
Phosphosite 3:	PDE1C	Q14123	S451	DMTEKIVSPLIDETS	66 / 9 AA	81
Phosphosite 4:	GALNT2	Q10471	S250	EDRTRVVSPIIDVIN	87 / 8 AA	65
Phosphosite 5:	IGSF10	Q6WRI0	S1940	TMEERVTSPRIEAAS	66 / 9 AA	291
Phosphosite 6:	LRRC66	Q68CR7	S627	FSKERQVSSSIDLLS	66 / 9 AA	98
Phosphosite 7:	PTPRQ	Q9UMZ3	S111	LAGERVGSAGILLSW	75 / 8 AA	261
Phosphosite 8:	HUNK	P57058	S600	NSSERTLSPGLPSGS	62 / 8 AA	80
Phosphosite 9:	SNX8	Q9Y5X2	S244	DRAERIASRAIDNAA	55 / 9 AA	53
Phosphosite 10:	FLNB	O75369	S2478	VTGQRLVSPGSANET	71 / 7 AA	278
Phosphosite 11:	SPIN4	Q56A73	T107	ILPERVPTPRIDSRL	66 / 9 AA	29
Phosphosite 12:	LAMB2	P55268	T587	DVVERLVTPGETPSW	71 / 7 AA	196
Phosphosite 13:	OTOG	Q6ZRI0	S1534	ATEEPVVSPGPTQTT	85 / 7 AA	315
Phosphosite 14:	GNAT1	P11488	T160	SDLERLVTPGYVPTE	71 / 7 AA	40
Phosphosite 15:	LEUTX	A8MZ59	S131	TANIRPVSPGISDAN	85 / 7 AA	25
Phosphosite 16:	HIVEP2	P31629	S2118	LSPRRPVSPGKDITA	75 / 8 AA	269
Phosphosite 17:	MUC5AC	P98088	S4387	IFNNKVVSPGFRKNG	62 / 8 AA	527
Phosphosite 18:	B4GALNT1	Q00973	S210	QADLTLVSPGLDQLN	71 / 7 AA	59
Phosphosite 19:	UIMC1	Q96RL1	S463	FDLEREVSPGSRDIL	85 / 7 AA	80
Phosphosite 20:	HUNK	P57058	T598	RRNSSERTLSPGLPS	71 / 7 AA	80