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:	S576
P-Site Sequence:	LMYSKFSSKSDIWAF
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	S576	LMYSKFSSKSDIWAF	100 / 9 AA	76
Phosphosite 1:	TEC	P42680	S544	FNYSRFSSKSDVWSF	77 / 9 AA	74
Phosphosite 2:	CTK	P42679	S403	LKHGKFTSKSDVWSF	66 / 9 AA	56
Phosphosite 3:	ITK	Q08881	S537	FSFSRYSSKSDVWSF	66 / 9 AA	72
Phosphosite 4:	Btk	Q06187	S578	YSKFSSKSDIWAFGV	100 / 7 AA	76
Phosphosite 5:	TXK	P42681	S445	FLFNKYSSKSDVWSF	66 / 9 AA	61
Phosphosite 6:	ZAP70	P43403	S518	INFRKFSSRSDVWSY	75 / 8 AA	70
Phosphosite 7:	VIT	Q6UXI7	S554	FGFDKYSSKPDILNA	75 / 8 AA	74
Phosphosite 8:	CSK	P41240	T365	LREKKFSTKSDVWSF	75 / 8 AA	51
Phosphosite 9:	TEC	P42680	S543	VFNYSRFSSKSDVWS	87 / 8 AA	74
Phosphosite 10:	C3orf33	Q6P1S2	S64	RLTSKFTSSSDIPVE	77 / 9 AA	34
Phosphosite 11:	Syk	P43405	S553	YYKFSSKSDVWSFGV	85 / 7 AA	72
Phosphosite 12:	TEC	P42680	S546	YSRFSSKSDVWSFGV	85 / 7 AA	74
Phosphosite 13:	CARD10	Q9BWT7	S551	KRSFSSMSDITGSVT	85 / 7 AA	116
Phosphosite 14:	CTK	P42679	T402	ALKHGKFTSKSDVWS	75 / 8 AA	56
Phosphosite 15:	CARD10	Q9BWT7	S549	PPKRSFSSMSDITGS	85 / 7 AA	116
Phosphosite 16:	CSK	P41240	S364	ALREKKFSTKSDVWS	85 / 7 AA	51
Phosphosite 17:	SYNGAP1	Q96PV0	S641	ANFSKFTSKEDFLGF	66 / 9 AA	148
Phosphosite 18:	OXSM	Q9NWU1	S108	FNEQNFVSKSDIKSM	75 / 8 AA	49
Phosphosite 19:	ZAP70	P43403	S517	CINFRKFSSRSDVWS	85 / 7 AA	70
Phosphosite 20:	ITK	Q08881	S536	VFSFSRYSSKSDVWS	75 / 8 AA	72