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:	S63
P-Site Sequence:	KPGDDLESDRYLITV
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	S63	KPGDDLESDRYLITV	100 / 9 AA	119
Phosphosite 1:	RELN	P78509	S2179	DFEGQLESDRFLLMS	66 / 9 AA	388
Phosphosite 2:	C4orf21	Q86YA3	Y66	DDLESDRYLITVEEV	100 / 6 AA	119
Phosphosite 3:	SON	P18583	S152	DGNIDLESDSFLKFD	75 / 8 AA	264
Phosphosite 4:	LARP5	Q92615	S175	LSRENLASDMYLISQ	55 / 9 AA	81
Phosphosite 5:	UACA	Q9BZF9	S343	MVADDLESEREKLKS	85 / 7 AA	163
Phosphosite 6:	CNTN1	Q12860	S88	NGDVDLTSDRYSMVG	85 / 7 AA	113
Phosphosite 7:	SPHK1	Q9NYA1	S181	IADVDLESEKYRRLG	71 / 7 AA	43
Phosphosite 8:	CNTN1	Q12860	T87	NNGDVDLTSDRYSMV	85 / 7 AA	113
Phosphosite 9:	exportin 7	Q9UIA9	S965	TTPLNQESDRFLHIM	62 / 8 AA	124
Phosphosite 10:	SNRK	Q9NRH2	T319	AIVEALETNRYNHIT	50 / 8 AA	84
Phosphosite 11:	ALDH3B2	P48448	Y234	QSNESDRYIAPTVLV	83 / 6 AA	43
Phosphosite 12:	ALDH3B1	P43353	Y315	QSDESDRYIAPTVLV	83 / 6 AA	52
Phosphosite 13:	MYH14	Q7Z406	S1146	EAQEDLESERVARTK	71 / 7 AA	228
Phosphosite 14:	PDIA4	P13667	S592	ATANDVPSDRYKVEG	62 / 8 AA	73
Phosphosite 15:	ALDH3B2	P48448	S231	IGGQSNESDRYIAPT	83 / 6 AA	43
Phosphosite 16:	MYH9	P35579	S1122	ELQEDLESERASRNK	71 / 7 AA	227
Phosphosite 17:	similar to FAT3	Q8TDW7	S4424	GSTRELESDYYLGGY	75 / 8 AA	506
Phosphosite 18:	ALDH3B1	P43353	S312	IGGQSDESDRYIAPT	83 / 6 AA	52
Phosphosite 19:	BAZ1A	Q9NRL2	S1012	IWRSALESGRYELLS	83 / 6 AA	179
Phosphosite 20:	similar to FAT3	Q8TDW7	Y4426	TRELESDYYLGGYDI	85 / 7 AA	506