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:	MRGPRX3
Human P-Site:	T21
P-Site Sequence:	PINGREETPCYKQTL
UniProt:	Q96LB0
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	MRGPRX3	Q96LB0	T21	PINGREETPCYKQTL	100 / 9 AA	36
Phosphosite 1:	MRGPRX4	Q96LA9	T21	PINGREETPCYNQTL	88 / 9 AA	36
Phosphosite 2:	MRGPRX1	Q96LB2	T21	PINGTEETLCYKQTL	77 / 9 AA	36
Phosphosite 3:	MRGPRX3	Q96LB0	Y24	GREETPCYKQTLSFT	100 / 6 AA	36
Phosphosite 4:	HTR2b	P41595	T273	TVFQRDETPCSSPEK	83 / 6 AA	54
Phosphosite 5:	ZNF704	Q6ZNC4	T278	PDSSRTETPCAKTET	66 / 9 AA	45
Phosphosite 6:	MRGPRX4	Q96LA9	Y24	GREETPCYNQTLSFT	83 / 6 AA	36
Phosphosite 7:	NT5C	Q8TCD5	T155	TVRGQEETPSWEHIL	62 / 8 AA	23
Phosphosite 8:	FOXO1A	Q12778	T402	PGTMMQQTPCYSFAP	57 / 7 AA	70
Phosphosite 9:	BC024868	O75864	T522	EEGERDETPCPALVP	83 / 6 AA	74
Phosphosite 10:	LRBA	P50851	T26	GGGGREETPTEGGAL	100 / 6 AA	319
Phosphosite 11:	RTL1	A6NKG5	T149	KESGREETPQEEQNQ	100 / 6 AA	155
Phosphosite 12:	GBF1	Q92538	T1067	ISLQREETPSNRGES	62 / 8 AA	206
Phosphosite 13:	IL1RL2	Q9HB29	T553	PVQLLQHTPCYRTAG	57 / 7 AA	65
Phosphosite 14:	CCDC81	Q6ZN84	Y483	KMEETQCYKRALDAQ	83 / 6 AA	76
Phosphosite 15:	LOC442780	Q8IX94	S519	TAFGREHSPCSPSPL	71 / 7 AA	57
Phosphosite 16:	FAM117B	Q6P1L5	S429	SNEGSEESPCSADDL	71 / 7 AA	62
Phosphosite 17:	CELA3B	P08861	Y158	LPNETPCYITGWGRL	100 / 5 AA	29
Phosphosite 18:	CACNA1D	Q01668	T1994	TPPYRDWTPCYTPLI	62 / 8 AA	245
Phosphosite 19:	PIK3R5	Q8WYR1	S836	SVVRCEVSPCYKPEK	71 / 7 AA	97
Phosphosite 20:	WDHD1	O75717	T637	IGFSAEGTPCYVDSE	83 / 6 AA	126