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:	S51
P-Site Sequence:	FERGRRGSKKGSIDV
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	S51	FERGRRGSKKGSIDV	100 / 9 AA	76
Phosphosite 1:	KIAA0556	O60303	S857	PASGRRGSRKDAGSS	66 / 9 AA	181
Phosphosite 2:	HEMK1	Q9Y5R4	S20	SGPGRRGSTRGWAFS	66 / 9 AA	38
Phosphosite 3:	SKAP55	Q86WV1	S172	APHLRRDSKKESCFE	75 / 8 AA	41
Phosphosite 4:	ZNF609	O15014	S413	NSKGRRGSQNSSEHR	66 / 9 AA	151
Phosphosite 5:	WNK1	Q9H4A3	S2270	NLSGRRGSKGHMNYE	100 / 6 AA	251
Phosphosite 6:	ARHGEF17	Q96PE2	S922	PRLIRRGSKKRPARS	100 / 6 AA	222
Phosphosite 7:	BMX	P51813	S50	YDKMKRGSRKGSIEI	75 / 8 AA	78
Phosphosite 8:	ZNF608	Q9ULD9	S473	NGKGRRGSLNASGRR	66 / 9 AA	162
Phosphosite 9:	GPR64	Q8IZP9	S1006	RMALRRTSKRGSLHF	75 / 8 AA	112
Phosphosite 10:	ZNF638	Q14966	S369	VHVGSRGSKKNYQSQ	85 / 7 AA	221
Phosphosite 11:	PHF8	Q9UPP1	S105	MKKRRGSSKGHDTHK	85 / 7 AA	118
Phosphosite 12:	PDE4DIP	Q5VU43	S1321	SEQGRRGSTLASSSE	66 / 9 AA	130
Phosphosite 13:	GPHN	Q9NQX3	S147	LIINLPGSKKGSQEC	85 / 7 AA	80
Phosphosite 14:	PHF8	Q9UPP1	S104	IMKKRRGSSKGHDTH	85 / 7 AA	118
Phosphosite 15:	FAM40B	Q9ULQ0	S344	KLRGRRGSRRQLLTK	71 / 7 AA	95
Phosphosite 16:	TTC15	Q8WVT3	S474	VYPGRRGSMVPFSMR	83 / 6 AA	79
Phosphosite 17:	SYNPO	Q8N3V7	S620	ESMARRGSRKSMFTF	62 / 8 AA	99
Phosphosite 18:	SH3BP5L	Q7L8J4	S378	RSGGRRGSDGGARGG	66 / 9 AA	43
Phosphosite 19:	ORAI2	Q96SN7	S45	QSWARRGSKQHPAVR	71 / 7 AA	29
Phosphosite 20:	MCM4	P33991	S13	STPSRRGSRRGRATP	71 / 7 AA	97