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:	ALK4
Human P-Site:	S191
P-Site Sequence:	YDLSTSGSGSGLPLF
UniProt:	P36896
Intern. Prot. ID:	IPI00005732

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	ALK4	P36896	S191	YDLSTSGSGSGLPLF	100 / 9 AA	57
Phosphosite 1:	ALK2	Q04771	S192	DHSCTSGSGSGLPFL	88 / 9 AA	57
Phosphosite 2:	TGFBR1	P36897	S189	YDMTTSGSGSGLPLL	88 / 9 AA	56
Phosphosite 3:	ALK1	P37023	S186	DSDCTTGSGSGLPFL	77 / 9 AA	56
Phosphosite 4:	UNC5B	Q8IZJ1	S492	YSSSTTGSGPGLADG	77 / 9 AA	104
Phosphosite 5:	ALK7	Q8NER5	S179	YDVTASGSGSGLPLL	77 / 9 AA	55
Phosphosite 6:	BMPR1A	P36894	S218	DQSQSSGSGSGLPLL	87 / 8 AA	60
Phosphosite 7:	BMPR1B	O00238	S188	EQSQSSGSGSGLPLL	87 / 8 AA	57
Phosphosite 8:	Elk-1	P19419	S343	TPGSGSGSGLQAPGP	100 / 7 AA	45
Phosphosite 9:	GIRK1	P48549	S20	QVVTTSSSGSGLQPQ	77 / 9 AA	57
Phosphosite 10:	MLL	Q03164	S3330	TSHLTSGSVSGLASS	87 / 8 AA	432
Phosphosite 11:	ALK7	Q8NER5	S181	VTASGSGSGLPLLVQ	100 / 7 AA	55
Phosphosite 12:	TGFBR1	P36897	S191	MTTSGSGSGLPLLVQ	100 / 7 AA	56
Phosphosite 13:	ALK4	P36896	S193	LSTSGSGSGLPLFVQ	100 / 7 AA	57
Phosphosite 14:	BMPR1A	P36894	S220	SQSSGSGSGLPLLVQ	100 / 7 AA	60
Phosphosite 15:	BMPR1B	O00238	S190	SQSSGSGSGLPLLVQ	100 / 7 AA	57
Phosphosite 16:	MAFF	Q9ULX9	S146	IVKSTPGSGSGPAHG	87 / 8 AA	18
Phosphosite 17:	Elk-1	P19419	S341	ERTPGSGSGSGLQAP	100 / 7 AA	45
Phosphosite 18:	AGBL2	Q5U5Z8	S720	IESSTSGSDSSLSDG	77 / 9 AA	104
Phosphosite 19:	ALK4	P36896	S189	LVYDLSTSGSGSGLP	100 / 7 AA	57
Phosphosite 20:	FOG1	Q8IX07	S775	RPGSGSGSGPGLAPA	77 / 9 AA	105