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:	GPR21
Human P-Site:	S226
P-Site Sequence:	QQHTKDISERQARFS
UniProt:	Q99679
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	GPR21	Q99679	S226	QQHTKDISERQARFS	100 / 9 AA	40
Phosphosite 1:	Bicd2	Q8TD16	S236	AIRLKEISERQLEEA	85 / 7 AA	94
Phosphosite 2:	SLC9A2	Q9UBY0	S629	HSLTADTSERQAKEI	77 / 9 AA	92
Phosphosite 3:	SLC5A9	Q2M3M2	S587	HESTPEISERPAGEC	66 / 9 AA	74
Phosphosite 4:	RAB9A	P51151	S129	LGNKIDISERQVSTE	85 / 7 AA	23
Phosphosite 5:	BRD8	Q9H0E9	S1133	SPFLKPVSERQAPGY	75 / 8 AA	135
Phosphosite 6:	USP40	Q9NVE5	S179	CKECKNVSERQEDFL	71 / 7 AA	140
Phosphosite 7:	MAP3K1	Q13233	S928	SASSEDISERLASIS	66 / 9 AA	164
Phosphosite 8:	PRPF4	O43172	S80	FEIEEHISERQAEVL	100 / 6 AA	58
Phosphosite 9:	HOXC13	P31276	S300	ISATTNLSERQVTIW	55 / 9 AA	35
Phosphosite 10:	HOXA13	P31271	S362	ISATTNLSERQVTIW	55 / 9 AA	40
Phosphosite 11:	FTSJ3	Q8IY81	S774	VVNTVDISEREKVAQ	75 / 8 AA	97
Phosphosite 12:	DLC1	Q96QB1	S586	GGTLMDLSERQEVSS	71 / 7 AA	171
Phosphosite 13:	CEP110	Q7Z7A1	S1909	TRLQKDISEWANRFE	83 / 6 AA	269
Phosphosite 14:	HK2	P52789	S340	RFETKDISDIEGEKD	55 / 9 AA	102
Phosphosite 15:	ARHGEF17	Q96PE2	S1420	AAMHRDLSEKQALCY	62 / 8 AA	222
Phosphosite 16:	MGAT4B	Q9UQ53	S76	DEIKRAVSERQALRD	62 / 8 AA	63
Phosphosite 17:	LOC91431	Q6ZU11	S7	_MHFRDTSERQSDAV	62 / 8 AA	105
Phosphosite 18:	PPP4R1	Q8TF05	T209	PMVGKDITERLILPR	83 / 6 AA	107
Phosphosite 19:	UCK2	Q9BZX2	S172	RRVLRDISERGRDLE	83 / 6 AA	29
Phosphosite 20:	C9orf5	Q9H330	S871	QRTFRDISERSEIFS	83 / 6 AA	101