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:	S504
P-Site Sequence:	RLCILRMSFVKGWGP
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	S504	RLCILRMSFVKGWGP	100 / 9 AA	60
Phosphosite 1:	Smad2	Q15796	S417	RMCTIRMSFVKGWGA	87 / 8 AA	52
Phosphosite 2:	ALX1	Q15699	S105	NCNSLRMSPVKGMQE	87 / 8 AA	37
Phosphosite 3:	IPCEF1	Q8WWN9	S342	TKKELRKSFVKRCKN	85 / 7 AA	49
Phosphosite 4:	OR10A7	Q8NGE5	S229	IITILRMSSATGRQK	66 / 9 AA	36
Phosphosite 5:	OR8U8	P0C7N1	S229	IFAILRMSSAEGRRK	66 / 9 AA	36
Phosphosite 6:	IL1B	P01584	S161	QQVVFSMSFVQGEES	55 / 9 AA	31
Phosphosite 7:	RTCD1	O00442	S173	GEVIVRMSPVKQLNP	75 / 8 AA	39
Phosphosite 8:	ZKSCAN2	Q63HK3	S303	NKRSILRSNYVKEKS	62 / 8 AA	111
Phosphosite 9:	BAG5	Q9UL15	T135	QDIILRLTHVKTGGK	62 / 8 AA	51
Phosphosite 10:	MDN1	Q9NU22	S2666	RESVLRMSFEFHQDP	83 / 6 AA	633
Phosphosite 11:	TRMT61B	Q9BVS5	S204	PGQILRSSFGKQYML	75 / 8 AA	53
Phosphosite 12:	TRMT61B	Q9BVS5	S203	FPGQILRSSFGKQYM	75 / 8 AA	53
Phosphosite 13:	TMEM38A	Q9H6F2	S184	TNEILHMSFPTKASL	83 / 6 AA	33
Phosphosite 14:	ANTXR1	Q9H6X2	S81	ISPQLRMSFIVFSTR	83 / 6 AA	63
Phosphosite 15:	TTN	Q8WZ42	S8282	ESSKFRMSFVDSVAV	62 / 8 AA	3816
Phosphosite 16:	Smad6	O43541	S467	DPNSVRISFAKGWGP	62 / 8 AA	53
Phosphosite 17:	TTN	Q8WZ42	S5276	ESSKHRMSFVESTAV	71 / 7 AA	3816
Phosphosite 18:	CCK	P06307	S78	KAPSGRMSIVKNLQN	83 / 6 AA	13
Phosphosite 19:	CHRM3	P20309	S482	ITKRKRMSLVKEKKA	71 / 7 AA	66
Phosphosite 20:	TMCO2	Q7Z6W1	S58	VQIILRISFLILLGI	71 / 7 AA	20