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:	S233
P-Site Sequence:	SERQARFSSQSGETG
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	S233	SERQARFSSQSGETG	100 / 9 AA	40
Phosphosite 1:	GPR21	Q99679	S234	ERQARFSSQSGETGE	100 / 8 AA	40
Phosphosite 2:	ATAD2B	Q9ULI0	T125	STGQARLTSQPGATL	66 / 9 AA	165
Phosphosite 3:	ZNF500	O60304	S177	LEEEARFSSQQPPAQ	85 / 7 AA	54
Phosphosite 4:	KPTN	Q9Y664	S24	DSFTRFSSQSNVYGL	75 / 8 AA	48
Phosphosite 5:	SWAP70	Q9UH65	S388	VELQARFSTELEREK	71 / 7 AA	69
Phosphosite 6:	KRTHA5	Q92764	S349	AETEARYSSQLAQMQ	71 / 7 AA	50
Phosphosite 7:	K32	Q14532	S348	TESEARYSSQLAQMQ	71 / 7 AA	50
Phosphosite 8:	KRT36	O76013	S345	AETEARYSSQLAQMQ	71 / 7 AA	52
Phosphosite 9:	KPTN	Q9Y664	S23	EDSFTRFSSQSNVYG	75 / 8 AA	48
Phosphosite 10:	ZNF500	O60304	S178	EEEARFSSQQPPAQL	100 / 6 AA	54
Phosphosite 11:	KRT31	Q15323	Y307	LTESEARYSSQLSQV	71 / 7 AA	47
Phosphosite 12:	KRT31	Q15323	S308	TESEARYSSQLSQVQ	71 / 7 AA	47
Phosphosite 13:	K32	Q14532	Y347	LTESEARYSSQLAQM	71 / 7 AA	50
Phosphosite 14:	KRT33B	Q14525	Y307	LTESEARYSSQLSQV	71 / 7 AA	46
Phosphosite 15:	KRT33B	Q14525	S308	TESEARYSSQLSQVQ	71 / 7 AA	46
Phosphosite 16:	KRT33A	O76009	Y307	LTESEARYSSQLSQV	71 / 7 AA	46
Phosphosite 17:	KRT33A	O76009	S308	TESEARYSSQLSQVQ	71 / 7 AA	46
Phosphosite 18:	C6	P13671	S272	ENQQGSFSSQGGSSF	66 / 9 AA	105
Phosphosite 19:	RPAP1	Q9BWH6	S360	ERMQARFSLQGELLA	75 / 8 AA	153
Phosphosite 20:	ZNF280D	Q6N043	S877	NSSEARFSSKNIKDL	62 / 8 AA	109