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:	PHOX2B
Human P-Site:	T103
P-Site Sequence:	RKQRRIRTTFTSAQL
UniProt:	Q99453
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	PHOX2B	Q99453	T103	RKQRRIRTTFTSAQL	100 / 9 AA	32
Phosphosite 1:	PHOX2A	O14813	T95	RKQRRIRTTFTSAQL	100 / 9 AA	30
Phosphosite 2:	PHOX2B	Q99453	T104	KQRRIRTTFTSAQLK	100 / 8 AA	32
Phosphosite 3:	PHOX2A	O14813	T96	KQRRIRTTFTSAQLK	100 / 8 AA	30
Phosphosite 4:	ARX	Q96QS3	T333	RKQRRYRTTFTSYQL	88 / 9 AA	58
Phosphosite 5:	ALX4	Q9H161	T219	GKKRRNRTTFTSYQL	88 / 9 AA	44
Phosphosite 6:	ISX	Q2M1V0	T87	KSKRRVRTTFTTEQL	77 / 9 AA	27
Phosphosite 7:	ALX1	Q15699	T137	SKKRRHRTTFTSLQL	88 / 9 AA	37
Phosphosite 8:	GSX1	Q9H4S2	T152	PSSKRMRTAFTSTQL	66 / 9 AA	28
Phosphosite 9:	GSX2	Q9BZM3	T207	PNGKRMRTAFTSTQL	66 / 9 AA	32
Phosphosite 10:	PRRX2	Q99811	T109	KKQRRNRTTFNSSQL	77 / 9 AA	27
Phosphosite 11:	PRRX1	P54821	T99	RKQRRNRTTFNSSQL	77 / 9 AA	27
Phosphosite 12:	ARX	Q96QS3	T334	KQRRYRTTFTSYQLE	87 / 8 AA	58
Phosphosite 13:	RAX	Q9Y2V3	T141	KKHRRNRTTFTTYQL	77 / 9 AA	37
Phosphosite 14:	RAX2	Q96IS3	T32	KKHRRNRTTFTTYQL	77 / 9 AA	20
Phosphosite 15:	HOXD3	P31249	T199	PASKRVRTAYTSAQL	55 / 9 AA	46
Phosphosite 16:	ISX	Q2M1V0	T88	SKRRVRTTFTTEQLH	75 / 8 AA	27
Phosphosite 17:	DRGX	A6NNA5	T38	RKQRRNRTTFTLQQL	87 / 8 AA	29
Phosphosite 18:	MNX1	P50219	T246	GKCRRPRTAFTSQQL	77 / 9 AA	41
Phosphosite 19:	OTX2	P32243	T43	RKQRRERTTFTRAQL	87 / 8 AA	32
Phosphosite 20:	OTX1	P32242	T43	RKQRRERTTFTRSQL	87 / 8 AA	37