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:	T643
P-Site Sequence:	EKADERPTFKILLSN
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	T643	EKADERPTFKILLSN	100 / 9 AA	76
Phosphosite 1:	BLK	P51451	T482	SRPEERPTFEFLQSV	66 / 9 AA	58
Phosphosite 2:	Src	P12931	T511	KEPEERPTFEYLQAF	66 / 9 AA	60
Phosphosite 3:	Fgr	P09769	T504	LDPEERPTFEYLQSF	66 / 9 AA	59
Phosphosite 4:	Fyn	P06241	T512	KDPEERPTFEYLQSF	66 / 9 AA	61
Phosphosite 5:	Lyn	P07948	T489	EKAEERPTFDYLQSV	66 / 9 AA	59
Phosphosite 6:	KSR2	Q6VAB6	T920	FEQEERPTFTKLMDM	66 / 9 AA	108
Phosphosite 7:	FGFR3	P22607	T740	AAPSQRPTFKQLVED	75 / 8 AA	88
Phosphosite 8:	FGFR4	P22455	T735	AAPSQRPTFKQLVEA	75 / 8 AA	88
Phosphosite 9:	FGFR2	P21802	T749	AVPSQRPTFKQLVED	75 / 8 AA	92
Phosphosite 10:	FGFR1	P11362	T746	AVPSQRPTFKQLVED	75 / 8 AA	92
Phosphosite 11:	MERTK	Q12866	T846	TDPLDRPTFSVLRLQ	62 / 8 AA	110
Phosphosite 12:	P4HA2	O15460	T441	SRNDERDTFKHLGTG	77 / 9 AA	61
Phosphosite 13:	YES1	P07947	T518	KDPDERPTFEYIQSF	66 / 9 AA	61
Phosphosite 14:	ADAMTSL3	P82987	T306	QRGSERQTFKIPGPL	85 / 7 AA	189
Phosphosite 15:	FRK	P42685	T479	AEPKERPTFETLRWK	75 / 8 AA	58
Phosphosite 16:	Lck	P06239	T486	ERPEDRPTFDYLRSV	55 / 9 AA	58
Phosphosite 17:	ERBB3	P21860	T957	IDENIRPTFKELANE	66 / 9 AA	148
Phosphosite 18:	C10orf18	Q5VWN6	T1077	NTADERTTFKKELIK	85 / 7 AA	269
Phosphosite 19:	MRE11A	P49959	T12	DALDDENTFKILVAT	66 / 9 AA	81
Phosphosite 20:	CAPN3	P20807	T314	RGSDERPTRTIIPVQ	66 / 9 AA	94