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:	MRGPRX4
Human P-Site:	T21
P-Site Sequence:	PINGREETPCYNQTL
UniProt:	Q96LA9
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	MRGPRX4	Q96LA9	T21	PINGREETPCYNQTL	100 / 9 AA	36
Phosphosite 1:	MRGPRX3	Q96LB0	T21	PINGREETPCYKQTL	88 / 9 AA	36
Phosphosite 2:	MRGPRX4	Q96LA9	Y24	GREETPCYNQTLSFT	100 / 6 AA	36
Phosphosite 3:	MRGPRX1	Q96LB2	T21	PINGTEETLCYKQTL	66 / 9 AA	36
Phosphosite 4:	FOXO1A	Q12778	T402	PGTMMQQTPCYSFAP	50 / 8 AA	70
Phosphosite 5:	HTR2b	P41595	T273	TVFQRDETPCSSPEK	83 / 6 AA	54
Phosphosite 6:	MRGPRX3	Q96LB0	Y24	GREETPCYKQTLSFT	83 / 6 AA	36
Phosphosite 7:	NT5C	Q8TCD5	T155	TVRGQEETPSWEHIL	62 / 8 AA	23
Phosphosite 8:	BC024868	O75864	T522	EEGERDETPCPALVP	83 / 6 AA	74
Phosphosite 9:	LRBA	P50851	T26	GGGGREETPTEGGAL	100 / 6 AA	319
Phosphosite 10:	RTL1	A6NKG5	T149	KESGREETPQEEQNQ	100 / 6 AA	155
Phosphosite 11:	LOC442780	Q8IX94	S519	TAFGREHSPCSPSPL	71 / 7 AA	57
Phosphosite 12:	CELA3B	P08861	Y158	LPNETPCYITGWGRL	100 / 5 AA	29
Phosphosite 13:	CACNA1D	Q01668	T1994	TPPYRDWTPCYTPLI	62 / 8 AA	245
Phosphosite 14:	FAM117B	Q6P1L5	S429	SNEGSEESPCSADDL	71 / 7 AA	62
Phosphosite 15:	WDHD1	O75717	T637	IGFSAEGTPCYVDSE	83 / 6 AA	126
Phosphosite 16:	NEB	P20929	T292	IKGKWSETPCFEVAN	57 / 7 AA	773
Phosphosite 17:	GPR82	Q96P67	S185	EATEGEESLCYNRQM	71 / 7 AA	38
Phosphosite 18:	TFDP2	Q14188	T426	CSESRGETPCSFNDE	71 / 7 AA	49
Phosphosite 19:	ANKRD40	Q6AI12	Y359	TLTERPCYNRRASKL	83 / 6 AA	41
Phosphosite 20:	ANKRD38	Q5T7N3	T538	PPAGREETSSNLPGK	62 / 8 AA	107