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:	MRGPRX1
Human P-Site:	T21
P-Site Sequence:	PINGTEETLCYKQTL
UniProt:	Q96LB2
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	MRGPRX1	Q96LB2	T21	PINGTEETLCYKQTL	100 / 9 AA	36
Phosphosite 1:	MRGPRX3	Q96LB0	T21	PINGREETPCYKQTL	77 / 9 AA	36
Phosphosite 2:	MRGPRX1	Q96LB2	Y24	GTEETLCYKQTLSLT	100 / 6 AA	36
Phosphosite 3:	HUNK	P57058	S398	GKSDIQDSLCYKTRL	44 / 9 AA	80
Phosphosite 4:	DDX43	Q9NXZ2	T293	AQTGTGKTLCYLMPG	75 / 8 AA	73
Phosphosite 5:	MRGPRX4	Q96LA9	T21	PINGREETPCYNQTL	66 / 9 AA	36
Phosphosite 6:	SLC16A14	Q7RTX9	T258	GGLGNEETLCDLQAQ	85 / 7 AA	56
Phosphosite 7:	GPR82	Q96P67	S185	EATEGEESLCYNRQM	71 / 7 AA	38
Phosphosite 8:	CRISPLD1	Q9H336	Y241	GCRENLCYKEGSDRY	83 / 6 AA	57
Phosphosite 9:	C17orf28	Q8IV36	T68	ESPSNLATLCYKAVE	83 / 6 AA	89
Phosphosite 10:	TDG	Q13569	Y267	PDTETLCYVMPSSSA	100 / 5 AA	46
Phosphosite 11:	TDG	Q13569	T264	HKIPDTETLCYVMPS	100 / 5 AA	46
Phosphosite 12:	CATSPER2	Q96P56	T433	SASKTEETLSKKREY	75 / 8 AA	62
Phosphosite 13:	RPAP2	Q8IXW5	T382	IEWKTEETLRFLYGQ	71 / 7 AA	70
Phosphosite 14:	PTCH1	Q13635	Y204	WKLEHLCYKSGELIT	83 / 6 AA	161
Phosphosite 15:	CCDC81	Q6ZN84	Y483	KMEETQCYKRALDAQ	83 / 6 AA	76
Phosphosite 16:	CCDC45	Q96GE4	T414	NEEVEDGTEETLSQH	100 / 6 AA	95
Phosphosite 17:	JMY	Q8N9B5	T284	MTEQEIDTLCYQLQV	66 / 6 AA	111
Phosphosite 18:	KPTN	Q9Y664	Y338	YGQELLCYKYRGPES	83 / 6 AA	48
Phosphosite 19:	Sh3tc1	Q8TE82	Y1234	EFDEETLYYVKVYLV	83 / 6 AA	147
Phosphosite 20:	L1TD1	Q5T7N2	T177	VMGSMEETLCNIDDR	62 / 8 AA	99