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:	S340
P-Site Sequence:	SQSSPIHSSTVDGND
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	S340	SQSSPIHSSTVDGND	100 / 9 AA	119
Phosphosite 1:	C4orf21	Q86YA3	S341	QSSPIHSSTVDGNDT	100 / 8 AA	119
Phosphosite 2:	C4orf21	Q86YA3	T342	SSPIHSSTVDGNDTE	100 / 7 AA	119
Phosphosite 3:	DDHD2	O94830	S278	NWHSPLHSTGVDVDL	66 / 9 AA	81
Phosphosite 4:	PHKA2	P46019	S975	RSVRPIHSSTSSPTI	100 / 6 AA	138
Phosphosite 5:	THOC2	Q8NI27	S1421	THPSPSHSSTVKDSL	77 / 9 AA	183
Phosphosite 6:	PHKA2	P46019	S976	SVRPIHSSTSSPTIS	100 / 6 AA	138
Phosphosite 7:	C6orf201	Q7Z4U5	S122	SAFGPIQSATVCGRQ	62 / 8 AA	23
Phosphosite 8:	MYO9A	B2RTY4	S1614	RKGSPCQSSTVKELS	66 / 9 AA	293
Phosphosite 9:	epsin 3	Q9H201	S351	DPWSPIPSGTVLSRS	75 / 8 AA	68
Phosphosite 10:	USP31	Q70CQ4	S891	SGDSPIHSSASTLEK	85 / 7 AA	147
Phosphosite 11:	CCDC88C	Q9P219	S231	HPPSPIKSSSADSTP	66 / 9 AA	228
Phosphosite 12:	CEP192	Q8TEP8	S634	NQCTPIPSSTVHSSV	75 / 8 AA	213
Phosphosite 13:	HERV-K_6q14.1 provirus ancestral Gag-Pol polyprotein	P63128	S718	KGVQIHTSVVDSDYK	62 / 8 AA	124
Phosphosite 14:	FAM48A	Q8NEM7	S385	SQMSPSHSSTDDHSN	77 / 9 AA	86
Phosphosite 15:	TRIM25	Q14258	S340	LIKGIHQSTIDLKNE	71 / 7 AA	71
Phosphosite 16:	CEP192	Q8TEP8	S635	QCTPIPSSTVHSSVA	85 / 7 AA	213
Phosphosite 17:	SMO	Q99835	S771	QGLGPIHSRTNLMDT	71 / 7 AA	86
Phosphosite 18:	ZNF644	Q9H582	T379	EESSPVHTSTFLSNT	71 / 7 AA	150
Phosphosite 19:	GLIS3	Q8NEA6	S134	PYPSPRHSSTRSHSA	85 / 7 AA	84
Phosphosite 20:	TULP4	Q9NRJ4	S697	PIAPIHSSAQAMSPT	83 / 6 AA	169