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:	S261
P-Site Sequence:	QILALLKSESSSSCE
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	S261	QILALLKSESSSSCE	100 / 9 AA	119
Phosphosite 1:	ZNF259	O75312	S328	MTRDLLKSETCSVEI	75 / 8 AA	51
Phosphosite 2:	UBXN4	Q92575	S117	RQMHLLKSETSVANG	85 / 7 AA	57
Phosphosite 3:	NCOA4	Q13772	S264	LENWLLKSEKSSYQK	87 / 8 AA	70
Phosphosite 4:	TNRC6B	Q9UPQ9	S146	VTGALLQSESGTAPD	66 / 9 AA	194
Phosphosite 5:	MAD1L1	Q9Y6D9	S482	MELKMLKSQSSSAEQ	75 / 8 AA	83
Phosphosite 6:	RNF20	Q5VTR2	S522	SGSALLQSQSSTEDP	66 / 9 AA	114
Phosphosite 7:	C4orf21	Q86YA3	S263	LALLKSESSSSCEEL	100 / 7 AA	119
Phosphosite 8:	GOLPH3L	Q9H4A5	S110	DRKVLLKSDSPTGDV	55 / 9 AA	33
Phosphosite 9:	SLC36A2	Q495M3	S469	ALDELLKSEDSHPFS	75 / 8 AA	53
Phosphosite 10:	PHIP	Q8WWQ0	S1471	ILKPQLKSESSTSAF	66 / 9 AA	207
Phosphosite 11:	PAICS	P22234	S262	RVELLLKSESQCRVV	100 / 6 AA	47
Phosphosite 12:	Putative rhophilin-2-like protein	A8MT19	S578	SPFSLLNSDSSSY__	66 / 9 AA	66
Phosphosite 13:	HMG20A	Q9NP66	S63	SQGQLLQSESSNAAE	75 / 8 AA	40
Phosphosite 14:	ELFN1	P0C7U0	S556	NCIDALKSESTSFQG	85 / 7 AA	88
Phosphosite 15:	MTBP	Q96DY7	S753	PRKRLVKSESSESLL	85 / 7 AA	102
Phosphosite 16:	APC	P25054	S535	ALVAQLKSESEDLQQ	85 / 7 AA	312
Phosphosite 17:	PHIP	Q8WWQ0	S1473	KPQLKSESSTSAFST	85 / 7 AA	207
Phosphosite 18:	ZFHX2	Q9C0A1	S1039	AVRAQLKSESKCYDL	85 / 7 AA	152
Phosphosite 19:	Basonuclin 1	Q01954	S868	TSSMKSESSSHSSWD	85 / 7 AA	111
Phosphosite 20:	TSC22D2	O75157	S735	RENALLKSLSSNDQL	77 / 9 AA	79