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:	S236
P-Site Sequence:	SELHPALSQAFQGKN
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	S236	SELHPALSQAFQGKN	100 / 9 AA	91
Phosphosite 1:	DLD	P09622	S491	CHAHPTLSEAFREAN	66 / 9 AA	54
Phosphosite 2:	HERV-K_19q12 provirus ancestral Gag polyprotein	Q9YNA8	S642	QGQQPPLSQVFQGIS	66 / 9 AA	74
Phosphosite 3:	ERVK6	Q7LDI9	S642	QGQQPPLSQVFQGIS	66 / 9 AA	74
Phosphosite 4:	HERV-K_5q33.3 provirus ancestral Gag polyprotein	P87889	S642	QGQQPPLSQVFQGIS	66 / 9 AA	74
Phosphosite 5:	HERV-K_22q11.21 provirus ancestral Gag polyprotein	P63145	S642	QGQQPPLSQVFQGIS	66 / 9 AA	74
Phosphosite 6:	HERV-K_1q22 provirus ancestral Gag polyprotein	P63130	S642	QEQQPPLSQVFQGIS	66 / 9 AA	74
Phosphosite 7:	HERV-K_6q14.1 provirus ancestral Gag-Pol polyprotein	P63128	S642	QGQQPPLSQVFQGIS	66 / 9 AA	124
Phosphosite 8:	HERV-K_6q14.1 provirus ancestral Gag polyprotein	P63126	S642	QGQQPPLSQVFQGIS	66 / 9 AA	74
Phosphosite 9:	HERV-K_19p13.11 provirus ancestral Gag polyprotein	P62684	S642	QGQQPPLSQVFQGIS	66 / 9 AA	74
Phosphosite 10:	HERV-K_12q14.1 provirus ancestral Gag polyprotein	P62683	S642	QGQQPPLSQVFQGIS	66 / 9 AA	74
Phosphosite 11:	EIF4ENIF1	Q9NRA8	S568	RAPSPPLSQVFQTRA	75 / 8 AA	108
Phosphosite 12:	FLNC	Q14315	S2646	VTRGPGLSQAFVGQK	85 / 7 AA	291
Phosphosite 13:	CKAP2	Q8WWK9	S145	QSQHMTLSQAFHLKN	66 / 9 AA	77
Phosphosite 14:	KIAA1267	Q7Z3B3	S115	LKSHPLLSQSYELRA	55 / 9 AA	121
Phosphosite 15:	IGSF21	Q96ID5	S329	EVKHPALSMPMQAEV	66 / 9 AA	52
Phosphosite 16:	KIAA1529	Q9P1Z9	S1288	QTTHPPLSHSFTPHP	62 / 8 AA	198
Phosphosite 17:	liprin alpha 4	O75335	S235	KLGHPALSQEEGKSA	85 / 7 AA	78
Phosphosite 18:	ARID1B	Q8NFD5	S769	SSSHPALSQSPMPQE	85 / 7 AA	236
Phosphosite 19:	Golgin subfamily A member 6-like protein 2	Q8N9W4	S144	SSFNLALSQAFRGSP	66 / 9 AA	79
Phosphosite 20:	PBX1	P40424	S23	MAGHPGLSQHLQDGA	66 / 9 AA	47