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:	S554
P-Site Sequence:	LDDEYTSSVGSKFPV
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	S554	LDDEYTSSVGSKFPV	100 / 9 AA	76
Phosphosite 1:	Btk	Q06187	S553	VLDDEYTSSVGSKFP	100 / 8 AA	76
Phosphosite 2:	Btk	Q06187	T552	YVLDDEYTSSVGSKF	100 / 7 AA	76
Phosphosite 3:	ITK	Q08881	S515	LDDQYTSSTGTKFPV	66 / 9 AA	72
Phosphosite 4:	ZNF546	Q86UE3	S49	TQGELTSSCGSKTMA	77 / 9 AA	98
Phosphosite 5:	EphB1	P54762	S781	SDPTYTSSLGGKIPV	75 / 8 AA	110
Phosphosite 6:	EPHB4	P54760	S777	SDPTYTSSLGGKIPI	75 / 8 AA	108
Phosphosite 7:	EphB3	P54753	S795	SDPTYTSSLGGKIPI	75 / 8 AA	110
Phosphosite 8:	Btk	Q06187	Y551	RYVLDDEYTSSVGSK	100 / 6 AA	76
Phosphosite 9:	TEC	P42680	S522	LDDQYTSSSGAKFPV	66 / 9 AA	74
Phosphosite 10:	SYNE2	Q8WXH0	S2322	SVKQNTSSVGQKIIK	66 / 9 AA	796
Phosphosite 11:	C11orf53	Q8IXP5	T35	QFSNDVYTSSVGKPF	100 / 6 AA	25
Phosphosite 12:	C11orf53	Q8IXP5	S37	SNDVYTSSVGKPFPC	100 / 6 AA	25
Phosphosite 13:	NRF1	Q16656	T123	RATLDEYTTRVGQQA	71 / 7 AA	54
Phosphosite 14:	Cdc20	Q12834	S231	QPGEYISSVAWIKEG	62 / 8 AA	55
Phosphosite 15:	TTN	Q8WZ42	S5117	FTCRATNSVGSKDSS	85 / 7 AA	3816
Phosphosite 16:	PPPDE1	Q9BSY9	Y20	DMYWMNEYTSSIGIG	83 / 6 AA	21
Phosphosite 17:	L3MBTL2	Q969R5	S39	SFRSYNSSVGSESSS	85 / 7 AA	79
Phosphosite 18:	L3MBTL2	Q969R5	S38	DSFRSYNSSVGSESS	85 / 7 AA	79
Phosphosite 19:	TSC22D1	Q15714	S483	TLSHYTESVGSGEMG	85 / 7 AA	110
Phosphosite 20:	BMX	P51813	S568	VLDDQYVSSVGTKFP	62 / 8 AA	78