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:	S226
P-Site Sequence:	SGNKLSDSLLTNEPV
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	S226	SGNKLSDSLLTNEPV	100 / 9 AA	119
Phosphosite 1:	5-HT (3) receptor ion channel	P46098	Y40	ALLRLSDYLLTNYRK	77 / 9 AA	55
Phosphosite 2:	C4orf21	Q86YA3	S224	VNSGNKLSDSLLTNE	100 / 7 AA	119
Phosphosite 3:	SFTA2	Q6UW10	S33	LQLKLKESFLTNSSY	66 / 9 AA	8
Phosphosite 4:	SLC38A8	A6NNN8	S133	QLEKLCDSLLSGTPP	66 / 9 AA	47
Phosphosite 5:	LRRC67	Q7Z4L9	S328	LSLKQSESLLTKNDV	66 / 9 AA	41
Phosphosite 6:	EYA4	O95677	S524	EIEGLTDSWLTNALK	75 / 8 AA	70
Phosphosite 7:	TNPO3	Q9Y5L0	S89	SHASLRDSLLTHIQN	75 / 8 AA	104
Phosphosite 8:	GREB1	Q4ZG55	S576	QARILSESLLTPAEY	85 / 7 AA	216
Phosphosite 9:	APEX2	Q9UBZ4	S227	PGRKWMDSLLSNLGC	66 / 9 AA	57
Phosphosite 10:	ADFP	Q99541	S369	SFKEVSDSLLTSSKG	75 / 8 AA	48
Phosphosite 11:	GNL3L	Q9NVN8	S563	DKIASKLSDSMMSAL	71 / 7 AA	66
Phosphosite 12:	CAST	P20810	S577	ALDKLSDSLGQRQPD	100 / 6 AA	77
Phosphosite 13:	CNOT7	Q9UIV1	S231	QHQAGSDSLLTGMAF	85 / 7 AA	33
Phosphosite 14:	CNOT8	Q9UFF9	S231	QHQAGSDSLLTGMAF	85 / 7 AA	34
Phosphosite 15:	CPNE4	Q96A23	S130	SQRKLSKSLLKHGNT	66 / 9 AA	62
Phosphosite 16:	RAB3B	P20337	S190	ICDKMSDSLDTDPSM	66 / 9 AA	25
Phosphosite 17:	WDR44	Q5JSH3	S285	KENITSDSLLTASMA	100 / 6 AA	101
Phosphosite 18:	TMTC2	Q8N394	S265	NPAADSDSLLTRTLT	100 / 6 AA	94
Phosphosite 19:	CAST	P20810	S575	DDALDKLSDSLGQRQ	100 / 6 AA	77
Phosphosite 20:	GZF1	Q9H116	S635	EYVSSKLSDKLLSFA	85 / 7 AA	80