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:	S438
P-Site Sequence:	MIKEGSMSEDEFIEE
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	S438	MIKEGSMSEDEFIEE	100 / 9 AA	76
Phosphosite 1:	BMX	P51813	S453	MIKEGSMSEDEFFQE	100 / 9 AA	78
Phosphosite 2:	TXK	P42681	S307	AINEGSMSEEDFIEE	77 / 9 AA	61
Phosphosite 3:	ITK	Q08881	S399	TIREGAMSEEDFIEE	66 / 9 AA	72
Phosphosite 4:	Lck	P06239	S281	SLKQGSMSPDAFLAE	66 / 9 AA	58
Phosphosite 5:	SNX5	Q9Y5X3	T117	GEGEGSMTKEEFAKM	66 / 9 AA	47
Phosphosite 6:	SNX6	Q9UNH7	T118	GEGEGSMTKEEFTKM	66 / 9 AA	47
Phosphosite 7:	Btk	Q06187	S436	IKMIKEGSMSEDEFI	100 / 7 AA	76
Phosphosite 8:	BMX	P51813	S451	VKMIKEGSMSEDEFF	100 / 7 AA	78
Phosphosite 9:	Cyclin D2	P30279	S271	DQRDGSKSEDELDQA	66 / 9 AA	33
Phosphosite 10:	RTN1	Q16799	S352	SQGKGSISEDELITA	75 / 8 AA	84
Phosphosite 11:	WTAP	Q15007	T299	FHREGNTTEDDFPSS	55 / 9 AA	44
Phosphosite 12:	TXK	P42681	S305	IKAINEGSMSEEDFI	85 / 7 AA	61
Phosphosite 13:	CEP170	Q5SW79	S1241	PTDYASTSEDEFGSN	75 / 8 AA	175
Phosphosite 14:	CEP350	Q5VT06	S994	LLSEGSLSEEEGDQD	75 / 8 AA	351
Phosphosite 15:	ZFHX3	Q15911	S972	MNVERSLSEDEWKAV	66 / 9 AA	404
Phosphosite 16:	MusTRD1	Q9UHL9	S477	RSDKGSMSEDCGPGT	100 / 6 AA	106
Phosphosite 17:	MusTRD1	Q9UHL9	S475	NARSDKGSMSEDCGP	100 / 6 AA	106
Phosphosite 18:	DACT1	Q9NYF0	S762	GDSESSVSEGEFVGE	66 / 9 AA	90
Phosphosite 19:	CEP350	Q5VT06	T1615	LKFDESMTEDEIEEQ	55 / 9 AA	351
Phosphosite 20:	BRMS1L	Q5PSV4	S30	AENEGSSSEDEDTES	87 / 8 AA	38