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:	S170
P-Site Sequence:	FLFSGADSAWCQTSD
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	S170	FLFSGADSAWCQTSD	100 / 9 AA	36
Phosphosite 1:	MRGPRX4	Q96LA9	S170	FLFSGADSSWCETSD	77 / 9 AA	36
Phosphosite 2:	MRGPRX4	Q96LA9	S171	LFSGADSSWCETSDF	75 / 8 AA	36
Phosphosite 3:	PIP5K	Q9Y2I7	S1770	ETLRGADSAYYQVGQ	75 / 8 AA	237
Phosphosite 4:	CEP250	Q9BV73	S914	EERTQAESALCQMQL	71 / 7 AA	281
Phosphosite 5:	APOH	P02749	S121	FYLNGADSAKCTEEG	75 / 8 AA	38
Phosphosite 6:	GDE	P35573	S1370	KDSYGASSPWCDYQL	62 / 8 AA	175
Phosphosite 7:	TBC1D22B	Q9NU19	S351	LRSIEADSFWCMSKL	71 / 7 AA	59
Phosphosite 8:	RanBP10	Q6VN20	S386	MHNTGADSPSCSNGV	62 / 8 AA	67
Phosphosite 9:	FAM83F	Q8NEG4	S367	EGASGGESAWRLESF	71 / 7 AA	55
Phosphosite 10:	JARID2	Q92833	S519	QAHGKADSASCENRS	71 / 7 AA	139
Phosphosite 11:	JARID2	Q92833	S521	HGKADSASCENRSTS	71 / 7 AA	139
Phosphosite 12:	Per2	O15055	S786	RNTSGIDSPWKKTGK	71 / 7 AA	137
Phosphosite 13:	RGPD5	Q99666	S1125	NLKPLSGSDRAWMWS	71 / 7 AA	199
Phosphosite 14:	RGPD4	Q7Z3J3	S1126	NLKPLSGSDRAWMWS	71 / 7 AA	198
Phosphosite 15:	RGPD1	Q68DN6	S1110	NLKPLSGSDRAWMWL	71 / 7 AA	197
Phosphosite 16:	RanBP2	P49792	S2101	NLKPLSGSDRAWMWL	71 / 7 AA	358
Phosphosite 17:	RGPD3	A6NKT7	S1126	NLKPLSGSDRAWMWS	71 / 7 AA	198
Phosphosite 18:	SH3D19	Q5HYK7	S696	QILERLDSDWCRGRL	66 / 6 AA	87
Phosphosite 19:	Death domain-containing protein 1	Q6ZMT9	S570	LGFRSQDSGWCGLDD	80 / 5 AA	102
Phosphosite 20:	MFAP1	P55081	S404	QDTTSFDSAWGQESA	83 / 6 AA	52