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:	MARCH-X
Human P-Site:	S126
P-Site Sequence:	KVDPSEPSPADQAPM
UniProt:	Q8NA82
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	MARCH-X	Q8NA82	S126	KVDPSEPSPADQAPM	100 / 9 AA	91
Phosphosite 1:	ANKLE2	Q86XL3	S778	ERDLLEPSPADQLGN	100 / 7 AA	104
Phosphosite 2:	ZNF192	Q15776	S12	SRKPSAPSPPDQTPE	77 / 9 AA	66
Phosphosite 3:	Putative viral protein-binding protein C1	Q6Q795	S57	SCMPAEPSPAAHYHQ	66 / 9 AA	13
Phosphosite 4:	C16orf46	Q6P387	S283	NDTPSSPSPAAQISL	77 / 9 AA	43
Phosphosite 5:	CASKIN1	Q8WXD9	T640	SPPPPEPTPADCQSP	75 / 8 AA	150
Phosphosite 6:	Nur77	P22736	S431	IPGFAELSPADQDLL	75 / 8 AA	64
Phosphosite 7:	PLA2G4D	Q86XP0	S703	PFPRVEPSPQDQHQP	85 / 7 AA	92
Phosphosite 8:	VEGFB	P49765	S161	DSAPGAPSPADITHP	75 / 8 AA	22
Phosphosite 9:	HOXB5	P09067	S116	GAKPSASSPSDQATS	66 / 9 AA	29
Phosphosite 10:	CD45	P08575	S940	RDPPSEPSPLEAEFQ	75 / 8 AA	150
Phosphosite 11:	FOX1	Q9NWB1	S76	AQTHSEQSPADTSAQ	85 / 7 AA	43
Phosphosite 12:	EXD3	Q8N9H8	S866	APSPCEPSPAPSPAS	85 / 7 AA	97
Phosphosite 13:	ATF6B	Q99941	T469	KEPQPSPTDQPSFSN	71 / 7 AA	77
Phosphosite 14:	endofin	Q7Z3T8	T680	TIESEPSTADTVVPI	85 / 7 AA	169
Phosphosite 15:	ZNF469	Q96JG9	S2478	PGAPAEPSPAALPAQ	85 / 7 AA	259
Phosphosite 16:	MARCH-X	Q8NA82	S123	KAEKVDPSEPSPADQ	100 / 6 AA	91
Phosphosite 17:	endofin	Q7Z3T8	S679	DTIESEPSTADTVVP	85 / 7 AA	169
Phosphosite 18:	ATF6B	Q99941	S467	GPKEPQPSPTDQPSF	71 / 7 AA	77
Phosphosite 19:	NCOR2	Q9Y618	T797	IPAPTEPTPASEATG	55 / 9 AA	275
Phosphosite 20:	PAPPA	Q13219	S935	GTEESEPSPAVTYIH	100 / 6 AA	181