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:	C4orf21
Human P-Site:	S219
P-Site Sequence:	YFCSPVNSGNKLSDS
UniProt:	Q86YA3
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	C4orf21	Q86YA3	S219	YFCSPVNSGNKLSDS	100 / 9 AA	119
Phosphosite 1:	SPTB	P11277	S1230	KVLSPVDSGNKLVAE	88 / 9 AA	246
Phosphosite 2:	SGK223	Q86YV5	S786	LAHSPTNSGKKLFAP	77 / 9 AA	150
Phosphosite 3:	CENPF	P49454	S3154	AQRSPVDSGTILREP	66 / 9 AA	368
Phosphosite 4:	ELAVL2	Q12926	S31	NCSSPVDSGNTEDSK	75 / 8 AA	40
Phosphosite 5:	C8orf48	Q96LL4	S51	RQSSPLTSGSKLERE	66 / 9 AA	37
Phosphosite 6:	PLEKHA7	Q6IQ23	S48	RTGEPVNSGHMIRSD	62 / 8 AA	127
Phosphosite 7:	BMS1L	Q14692	S625	SKPSQVSSGQKLGPQ	66 / 9 AA	146
Phosphosite 8:	CANX	P27824	S259	VDQSVVNSGNLLNDM	77 / 9 AA	68
Phosphosite 9:	LRRC9	Q6ZRR7	S1358	LDGSPVNSDDRAKAE	62 / 8 AA	128
Phosphosite 10:	RELN	P78509	T369	DSLDPVDTGNWLFFP	62 / 8 AA	388
Phosphosite 11:	TCP1	P17987	S194	QPRYPVNSVNILKAH	75 / 8 AA	60
Phosphosite 12:	HTR3E	A5X5Y0	S275	SFYLPVKSGNRVPFK	62 / 8 AA	51
Phosphosite 13:	IFITM2	Q01629	S13	QTFSPVNSGQPPNYE	100 / 6 AA	15
Phosphosite 14:	IFITM3	Q01628	S14	TFFSPVNSGQPPNYE	100 / 6 AA	15
Phosphosite 15:	PTPN13	Q12923	T1347	ESSSSVNTSNKMNFK	55 / 9 AA	277
Phosphosite 16:	YBX2	Q9Y2T7	S355	ETSAPVNSGDPTTTI	71 / 7 AA	39
Phosphosite 17:	LBA1	O15050	S343	QLVKYMNSGNRLLHK	71 / 7 AA	284
Phosphosite 18:	G3BP1	Q13283	S373	VVELRINSGGKLPNF	62 / 8 AA	52
Phosphosite 19:	PDE3B	Q13370	S518	SSLSPVNSSNHGPVS	85 / 7 AA	124
Phosphosite 20:	ALKBH5	Q6P6C2	S388	AAGSPGNSGSSLRSC	66 / 9 AA	51