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:	Btk
Human P-Site:	S578
P-Site Sequence:	YSKFSSKSDIWAFGV
UniProt:	Q06187
Intern. Prot. ID:	IPI00029132

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	Btk	Q06187	S578	YSKFSSKSDIWAFGV	100 / 9 AA	76
Phosphosite 1:	PTK7	Q13308	S987	EGDFSTKSDVWAFGV	77 / 9 AA	118
Phosphosite 2:	Syk	P43405	S553	YYKFSSKSDVWSFGV	77 / 9 AA	72
Phosphosite 3:	TEC	P42680	S546	YSRFSSKSDVWSFGV	77 / 9 AA	74
Phosphosite 4:	MERTK	Q12866	S781	DRVYTSKSDVWAFGV	66 / 9 AA	110
Phosphosite 5:	SGK071	Q8NE28	S215	NFSFSQKSDIWSLGC	77 / 9 AA	76
Phosphosite 6:	ITK	Q08881	S539	FSRYSSKSDVWSFGV	66 / 9 AA	72
Phosphosite 7:	TXK	P42681	S447	FNKYSSKSDVWSFGV	66 / 9 AA	61
Phosphosite 8:	CTK	P42679	S405	HGKFTSKSDVWSFGV	66 / 9 AA	56
Phosphosite 9:	CSK	P41240	S367	EKKFSTKSDVWSFGI	66 / 9 AA	51
Phosphosite 10:	ZAP70	P43403	S520	FRKFSSRSDVWSYGV	66 / 9 AA	70
Phosphosite 11:	ROR1	Q01973	S673	YGKFSSDSDIWSFGV	77 / 9 AA	104
Phosphosite 12:	Axl	P30530	S730	DRVYTSKSDVWSFGV	55 / 9 AA	97
Phosphosite 13:	SRMS	Q9H3Y6	S407	YRVFSQKSDVWSFGV	66 / 9 AA	55
Phosphosite 14:	MAP2K6	P52564	S238	QKGYSVKSDIWSLGI	66 / 9 AA	37
Phosphosite 15:	YSK4	Q56UN5	S1248	ESGYGRKSDIWSIGC	55 / 9 AA	151
Phosphosite 16:	Btk	Q06187	S576	LMYSKFSSKSDIWAF	100 / 7 AA	76
Phosphosite 17:	FRK	P42685	S414	SNKFSIKSDVWSFGI	66 / 9 AA	58
Phosphosite 18:	Fer	P16591	S741	YGRYSSESDVWSFGI	55 / 9 AA	95
Phosphosite 19:	Fes	P07332	S741	YGRYSSESDVWSFGI	55 / 9 AA	93
Phosphosite 20:	JAK3	P52333	S1008	DNIFSRQSDVWSFGV	55 / 9 AA	125