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:	S556
P-Site Sequence:	SNKISQDSESWVKDI
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	S556	SNKISQDSESWVKDI	100 / 9 AA	119
Phosphosite 1:	C4orf21	Q86YA3	S558	KISQDSESWVKDILV	100 / 7 AA	119
Phosphosite 2:	ZHX3	Q9H4I2	S927	YSEVSENSESWEPRV	62 / 8 AA	105
Phosphosite 3:	Putative BANP-like protein	Q9H8C5	S189	QVQITQDSESPCSGT	85 / 7 AA	22
Phosphosite 4:	Rabphilin 3A	Q9Y2J0	S248	MSSSSRDSESWDHSG	85 / 7 AA	77
Phosphosite 5:	CCDC97	Q96F63	S268	DQRSGKDSEAWVPDS	62 / 8 AA	39
Phosphosite 6:	SLC17A4	Q9Y2C5	S452	TAAGFFISQDSEFGW	100 / 6 AA	54
Phosphosite 7:	C4orf21	Q86YA3	S553	SQESNKISQDSESWV	100 / 6 AA	119
Phosphosite 8:	ST5	P78524	S1011	NELISQDSDSDSDDE	85 / 7 AA	126
Phosphosite 9:	C6orf141	Q5SZD1	S83	GEELDRESWVREKVL	83 / 6 AA	27
Phosphosite 10:	OTOA	Q7RTW8	S249	SSNATDDSASWVSAE	62 / 8 AA	129
Phosphosite 11:	ZNF291	Q9BY12	S922	VQVQDSGSWANNKVS	71 / 7 AA	158
Phosphosite 12:	C6orf15	Q6UXA7	S173	ASLLHQDSESRRLPR	62 / 8 AA	34
Phosphosite 13:	C6orf15	Q6UXA7	S175	LLHQDSESRRLPRSN	83 / 6 AA	34
Phosphosite 14:	Rabphilin 3A	Q9Y2J0	S250	SSSRDSESWDHSGGA	83 / 6 AA	77
Phosphosite 15:	ARHGAP12	Q8IWW6	S213	SERIHQDSESGDELS	85 / 7 AA	96
Phosphosite 16:	OTOA	Q7RTW8	S251	NATDDSASWVSAEHL	71 / 7 AA	129
Phosphosite 17:	ATG4C	Q96DT6	S148	IENSDSESWTSHTVK	83 / 6 AA	52
Phosphosite 18:	TTN	Q8WZ42	S20559	VEVKRADSDNWVRCN	66 / 6 AA	3816
Phosphosite 19:	ANKRD38	Q5T7N3	S442	NLLGSMESESWGHRG	71 / 7 AA	107
Phosphosite 20:	ZNF291	Q9BY12	S920	KQVQVQDSGSWANNK	71 / 7 AA	158