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:	SPEN
Human P-Site:	S278
P-Site Sequence:	GSGSRSRSSSSDSIS
UniProt:	Q96T58
Intern. Prot. ID:	IPI00045914

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	SPEN	Q96T58	S278	GSGSRSRSSSSDSIS	100 / 9 AA	402
Phosphosite 1:	CLK2	P49760	S36	RRRSRSWSSSSDRTR	88 / 9 AA	60
Phosphosite 2:	SPEN	Q96T58	S279	SGSRSRSSSSDSISS	100 / 8 AA	402
Phosphosite 3:	NKTR	P30414	S1390	SSRSRSRSSSYDPHS	88 / 9 AA	166
Phosphosite 4:	TOPORS	Q9NS56	S672	ESTSRSRSRSSDHGK	88 / 9 AA	119
Phosphosite 5:	SFRS6	Q13247	S340	KSRSRSRSSSRD___	88 / 9 AA	40
Phosphosite 6:	ACIN1	Q9UKV3	S647	RSRSRSRSASSNSRK	77 / 9 AA	152
Phosphosite 7:	CLK2	P49760	S37	RRSRSWSSSSDRTRR	87 / 8 AA	60
Phosphosite 8:	ZNF265	O95218	S292	RKRSRSRSSSSGDRK	88 / 9 AA	37
Phosphosite 9:	NKTR	P30414	S1391	SRSRSRSSSYDPHSR	87 / 8 AA	166
Phosphosite 10:	LRRC16A	Q5VZK9	S1247	EAGSRSRSSSSTPTS	100 / 8 AA	152
Phosphosite 11:	ZFC3H1	O60293	S500	GGKRRSRSKSSDPDL	87 / 8 AA	226
Phosphosite 12:	MAPK8IP1	Q9UQF2	S471	FMSGRSRSSSAESFG	75 / 8 AA	78
Phosphosite 13:	CCDC61	Q9Y6R9	S370	PNRSRNRSSSVDSFR	77 / 9 AA	53
Phosphosite 14:	S1PR3	Q99500	S339	LDPSRSKSSSSNNSS	77 / 9 AA	42
Phosphosite 15:	ACIN1	Q9UKV3	S593	SSSSRSRSRSPDSSG	77 / 9 AA	152
Phosphosite 16:	PNN	Q9H307	S577	TSKSRSRSSSSSSSS	100 / 8 AA	82
Phosphosite 17:	ZNF265	O95218	S233	RSRSRSRSSSSSQSR	100 / 8 AA	37
Phosphosite 18:	SFRS6	Q13247	S341	SRSRSRSSSRD____	87 / 8 AA	40
Phosphosite 19:	ZNF265	O95218	S243	SSQSRSRSSSRERSR	77 / 9 AA	37
Phosphosite 20:	MAPK8IP1	Q9UQF2	S472	MSGRSRSSSAESFGL	75 / 8 AA	78