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:	REXO1
Human P-Site:	S721
P-Site Sequence:	RLAEKSPSVHISAPG
UniProt:	Q8N1G1
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	REXO1	Q8N1G1	S721	RLAEKSPSVHISAPG	100 / 9 AA	132
Phosphosite 1:	REXO1	Q8N1G1	S719	PARLAEKSPSVHISA	100 / 7 AA	132
Phosphosite 2:	HERV-K_1q22 provirus ancestral Pol protein	P63135	S1208	RPWEASPSVHILTEV	87 / 8 AA	165
Phosphosite 3:	HERV-K_1q22 provirus ancestral Env polyprotein	P61567	S337	RPWEASPSVHILTEV	87 / 8 AA	67
Phosphosite 4:	HERV-K_22q11.21 provirus ancestral Env polyprotein	P61566	S337	RPWEASPSVHILTEV	87 / 8 AA	67
Phosphosite 5:	MPDZ	O75970	S918	RQDENTPSVDISMGP	66 / 9 AA	219
Phosphosite 6:	NBEA	Q8NFP9	S562	GYLLEKSSRVHITRA	75 / 8 AA	328
Phosphosite 7:	HERV-K_16p3.3 provirus ancestral Env polyprotein	Q9NX77	S272	RPWESSPSIHIVNEV	75 / 8 AA	55
Phosphosite 8:	HERV-K_11q22.1 provirus ancestral Env polyprotein	P61570	S448	RPWEASPSIHILTEV	75 / 8 AA	75
Phosphosite 9:	HERV-K_1q23.3 provirus ancestral Env polyprotein	O42043	S337	RPWEASPSIHILTEI	75 / 8 AA	64
Phosphosite 10:	MTFR1	Q15390	S115	LFFEKAPSRQISLPD	66 / 9 AA	37
Phosphosite 11:	C3orf30	Q96M34	S239	VPSDQSPSVQIDSGS	62 / 8 AA	60
Phosphosite 12:	FSCB	Q5H9T9	S377	PPAEKSPSVELLGEI	75 / 8 AA	89
Phosphosite 13:	TRMT5	Q32P41	S381	LSKERKPSVHVVMNL	62 / 8 AA	58
Phosphosite 14:	GPR123	Q86SQ6	S681	TAAERAPSVHGGHSL	71 / 7 AA	137
Phosphosite 15:	BTBD12	Q8IY92	S1123	MFPEKSPSIDLTQSN	55 / 9 AA	200
Phosphosite 16:	MCR	P08235	S191	PIMCHEKSPSVCSPL	100 / 6 AA	107
Phosphosite 17:	TTC1	Q99614	S221	SILEKDPSIHQAREA	71 / 7 AA	34
Phosphosite 18:	FSCB	Q5H9T9	S375	LPPPAEKSPSVELLG	100 / 6 AA	89
Phosphosite 19:	abLIM2	Q6H8Q1	S19	SPLEKSPSTAILCNT	75 / 8 AA	68
Phosphosite 20:	HERV-K_1q22 provirus ancestral Pol protein	P63135	S1206	MDRPWEASPSVHILT	85 / 7 AA	165