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:	C9orf21
Human P-Site:	S139
P-Site Sequence:	KRGEEIASSGQSPHI
UniProt:	Q7RTV5
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	C9orf21	Q7RTV5	S139	KRGEEIASSGQSPHI	100 / 9 AA	25
Phosphosite 1:	C9orf21	Q7RTV5	S140	RGEEIASSGQSPHIK	100 / 8 AA	25
Phosphosite 2:	UPF1	Q92900	S770	QGQEEIASSGTSYLN	88 / 9 AA	124
Phosphosite 3:	KIAA0947	Q9Y2F5	S1498	CPQEDVSSSGQSTNF	66 / 9 AA	248
Phosphosite 4:	PGCP	Q9Y646	S42	EIKEEIASCGDVAKA	75 / 8 AA	52
Phosphosite 5:	GLE1	Q53GS7	S661	PRIEAITSSGQMGSF	75 / 8 AA	80
Phosphosite 6:	UPF1	Q92900	S771	GQEEIASSGTSYLNR	87 / 8 AA	124
Phosphosite 7:	GLE1	Q53GS7	T660	FPRIEAITSSGQMGS	75 / 8 AA	80
Phosphosite 8:	BCAN	Q96GW7	T287	RGAEIATTGQLYAAW	71 / 7 AA	99
Phosphosite 9:	MCTP2	Q6DN12	S780	NVLEEIASFGERIKN	66 / 9 AA	100
Phosphosite 10:	MLLT10	P55197	S852	VLNQDLTSSGQSTSS	55 / 9 AA	109
Phosphosite 11:	SACS	Q9NZJ4	S1798	ALFEMAKSGQSKKPS	75 / 8 AA	521
Phosphosite 12:	ZC3H12C	Q9C0D7	S86	EASEENASSGDSEEN	77 / 9 AA	99
Phosphosite 13:	DMD	P11532	S2384	PDVEEILSKGQHLYK	75 / 8 AA	427
Phosphosite 14:	KIAA0947	Q9Y2F5	S1497	SCPQEDVSSSGQSTN	62 / 8 AA	248
Phosphosite 15:	ZNF462	Q96JM2	S701	TRIDEIASNLQSKIN	66 / 9 AA	285
Phosphosite 16:	C2orf55	Q6NV74	S279	VSPEERPSSGQQDVA	75 / 8 AA	102
Phosphosite 17:	ZNF131	P52739	S192	ETLEEVASAKQSVKY	66 / 9 AA	71
Phosphosite 18:	ATXN2	Q99700	S450	QLAEEIESSAQYKAR	75 / 8 AA	140
Phosphosite 19:	NEK4	P51957	S630	QSQEEMSSSGPSVRK	66 / 9 AA	95
Phosphosite 20:	RREB1	Q92766	S1356	DGAEEDASSNQSLDL	77 / 9 AA	181