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:	S420
P-Site Sequence:	SSLQVTCSSAENDGI
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	S420	SSLQVTCSSAENDGI	100 / 9 AA	119
Phosphosite 1:	C4orf21	Q86YA3	T418	ESSSLQVTCSSAEND	100 / 7 AA	119
Phosphosite 2:	TMEM104	Q8NE00	S177	SLMQVTCSATGNDSC	66 / 9 AA	55
Phosphosite 3:	SMYD4	Q8IYR2	S28	TSVQVTISTAETLRD	66 / 9 AA	89
Phosphosite 4:	TRIM9	Q9C026	S561	DNLTVTCSSYDDRVV	62 / 8 AA	79
Phosphosite 5:	LTF	P02788	T389	GLSEGSVTCSSASTT	100 / 6 AA	78
Phosphosite 6:	CFHR4	Q92496	S255	GSNYVTCSNGEWSEP	71 / 7 AA	37
Phosphosite 7:	CSRNP3	Q8WYN3	S505	PSVIVCCSSSENDSG	75 / 8 AA	65
Phosphosite 8:	CFHR3	Q02985	S254	GSNYVTCSNGEWSEP	71 / 7 AA	37
Phosphosite 9:	GIF	P27352	S289	DVPQVTCSPDHEVQP	83 / 6 AA	45
Phosphosite 10:	LTF	P02788	S391	SEGSVTCSSASTTED	100 / 6 AA	78
Phosphosite 11:	RTN4	Q9NQC3	S202	ASEPVIRSSAENMDL	66 / 9 AA	130
Phosphosite 12:	FAM44A	Q8NFC6	S2643	GDIMVTVSSEENVCD	66 / 9 AA	330
Phosphosite 13:	MCM3AP	O60318	S199	FSFPQVTSSSATTSN	85 / 7 AA	218
Phosphosite 14:	CCDC30	Q5VVM6	S257	RLQILCNSAENELRY	62 / 8 AA	91
Phosphosite 15:	GIF	P27352	T287	YLDVPQVTCSPDHEV	83 / 6 AA	45
Phosphosite 16:	TMEM104	Q8NE00	T175	PFSLMQVTCSATGND	71 / 7 AA	55
Phosphosite 17:	RTN4	Q9NQC3	S203	SEPVIRSSAENMDLK	75 / 8 AA	130
Phosphosite 18:	MYO16	Q9Y6X6	S1503	PPTPVTCSPASDESP	55 / 9 AA	206
Phosphosite 19:	MCM3AP	O60318	S200	SFPQVTSSSATTSNF	85 / 7 AA	218
Phosphosite 20:	FGFR1	P11362	S790	TRSSTCSSGEDSVFS	71 / 7 AA	92