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:	S553
P-Site Sequence:	VLDDEYTSSVGSKFP
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	S553	VLDDEYTSSVGSKFP	100 / 9 AA	76
Phosphosite 1:	Btk	Q06187	T552	YVLDDEYTSSVGSKF	100 / 8 AA	76
Phosphosite 2:	Btk	Q06187	S554	LDDEYTSSVGSKFPV	100 / 8 AA	76
Phosphosite 3:	Btk	Q06187	Y551	RYVLDDEYTSSVGSK	100 / 7 AA	76
Phosphosite 4:	NRF1	Q16656	T123	RATLDEYTTRVGQQA	75 / 8 AA	54
Phosphosite 5:	BMX	P51813	S568	VLDDQYVSSVGTKFP	66 / 9 AA	78
Phosphosite 6:	C11orf53	Q8IXP5	T35	QFSNDVYTSSVGKPF	87 / 8 AA	25
Phosphosite 7:	ITK	Q08881	S514	VLDDQYTSSTGTKFP	66 / 9 AA	72
Phosphosite 8:	SLC27A4	Q6P1M0	S112	RQLDEYSSSVANFLQ	66 / 9 AA	72
Phosphosite 9:	ITK	Q08881	T513	FVLDDQYTSSTGTKF	75 / 8 AA	72
Phosphosite 10:	SLC27A4	Q6P1M0	Y110	TFRQLDEYSSSVANF	85 / 7 AA	72
Phosphosite 11:	PPPDE1	Q9BSY9	Y20	DMYWMNEYTSSIGIG	71 / 7 AA	21
Phosphosite 12:	MAGE-C1	O60732	Y878	SSSPVDEYTSSSDTL	100 / 6 AA	124
Phosphosite 13:	NRF1	Q16656	Y122	LRATLDEYTTRVGQQ	71 / 7 AA	54
Phosphosite 14:	senataxin	Q7Z333	T212	LESPDIYTSSVLEKG	85 / 7 AA	303
Phosphosite 15:	C11orf53	Q8IXP5	S37	SNDVYTSSVGKPFPC	100 / 6 AA	25
Phosphosite 16:	TEC	P42680	T520	YVLDDQYTSSSGAKF	75 / 8 AA	74
Phosphosite 17:	MAGE-C1	O60732	T879	SSPVDEYTSSSDTLL	100 / 6 AA	124
Phosphosite 18:	senataxin	Q7Z333	Y211	LLESPDIYTSSVLEK	85 / 7 AA	303
Phosphosite 19:	MAGE-C1	O60732	S880	SPVDEYTSSSDTLLE	100 / 6 AA	124
Phosphosite 20:	AZI2	Q9H6S1	S82	ARFEEETSSVGREQV	75 / 8 AA	45