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:	S647
P-Site Sequence:	DTLSNFESFKWTDAV
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	S647	DTLSNFESFKWTDAV	100 / 9 AA	119
Phosphosite 1:	TGFBR1	P36897	S395	INMKHFESFKRADIY	62 / 8 AA	56
Phosphosite 2:	PDE2A	O00408	S602	AIDSNFASFTYTPRS	66 / 9 AA	106
Phosphosite 3:	MYBPC2	Q14324	S167	ASGQSLESFKRTSEK	62 / 8 AA	128
Phosphosite 4:	ZNF423	Q2M1K9	S646	LKFSNFESFQTHLKL	85 / 7 AA	145
Phosphosite 5:	Rap1GAP	P47736	S430	GGGGFFESFKRVIRS	71 / 7 AA	73
Phosphosite 6:	DNMT1	P26358	S1273	ENVRNFVSFKRSMVL	62 / 8 AA	183
Phosphosite 7:	Rab3GAP1	Q15042	S685	CLLSDMESFKAANPG	71 / 7 AA	111
Phosphosite 8:	PHRF1	Q9P1Y6	S776	GVGSTFESFRINIPG	71 / 7 AA	179
Phosphosite 9:	PKG1	Q13976	S651	TDTSNFDSFPEDNDE	83 / 6 AA	76
Phosphosite 10:	G2E3	Q7L622	S558	RVHTPFESFKQGLKT	100 / 5 AA	81
Phosphosite 11:	ACSM3	Q53FZ2	Y43	TPQNFSNYESMKQDF	71 / 7 AA	66
Phosphosite 12:	SCN7A	Q01118	T1419	NDVSNFETFGNSMLC	83 / 6 AA	193
Phosphosite 13:	CSF2	P04141	S122	TQIITFESFKENLKD	100 / 5 AA	16
Phosphosite 14:	FSIP2	Q5CZC0	S3051	PRESNFGSFDQTMKG	66 / 9 AA	370
Phosphosite 15:	PTTG2	Q9NZH5	S127	FNLLDFESFDLPEER	57 / 7 AA	22
Phosphosite 16:	PTTG1	O95997	S127	FNPLDFESFDLPEEH	57 / 7 AA	22
Phosphosite 17:	TNKS1BP1	Q9C0C2	S475	SNWSLSQSFEWTFPT	66 / 6 AA	182
Phosphosite 18:	PCNX	Q96RV3	S1817	HMSSNLESFLYGLHA	62 / 8 AA	259
Phosphosite 19:	OGFRL1	Q5TC84	S253	LGELGYESFKSPLVK	57 / 7 AA	51
Phosphosite 20:	C10orf107	Q8IVU9	S32	LHMSLEESIKWLGEV	80 / 5 AA	24