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:	DDX21
Human P-Site:	S281
P-Site Sequence:	NQVSKDFSDITKKLS
UniProt:	Q9NR30
Intern. Prot. ID:	IPI00015953

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	DDX21	Q9NR30	S281	NQVSKDFSDITKKLS	100 / 9 AA	87
Phosphosite 1:	ABCA13	Q86UQ4	S2632	MNQSKDFSDILEEIA	100 / 7 AA	576
Phosphosite 2:	GTF2E2	P29084	Y284	LAGVLKDYSDITSSK	85 / 7 AA	33
Phosphosite 3:	GTF2E2	P29084	S285	AGVLKDYSDITSSK_	85 / 7 AA	33
Phosphosite 4:	ZBTB32	Q9Y2Y4	S414	PQRSRDFSAMTKHLR	66 / 9 AA	53
Phosphosite 5:	USH2A	O75445	S5189	NAIKDFSSVTKERTT	75 / 8 AA	576
Phosphosite 6:	DDX21	Q9NR30	T284	SKDFSDITKKLSVAC	100 / 6 AA	87
Phosphosite 7:	KIAA1958	Q8N8K9	T444	TNGLKDHTDITKIPA	75 / 8 AA	79
Phosphosite 8:	FN1	P02751	S1367	SPTGIDFSDITANSF	100 / 6 AA	263
Phosphosite 9:	NAT8B	Q9UHF3	S95	IALRTDMSDITKSYL	85 / 7 AA	25
Phosphosite 10:	UTRN	P46939	S19	DNGQNEFSDIIKSRS	62 / 8 AA	394
Phosphosite 11:	MTA1	Q13330	T308	EKYGKDFTDIQQDFL	71 / 7 AA	81
Phosphosite 12:	ZNF664	Q8N3J9	S69	DDCGKDFSTTTKLNR	66 / 9 AA	30
Phosphosite 13:	ZNF233	A6NK53	S518	DTCGKDFSQISHLQA	62 / 8 AA	77
Phosphosite 14:	LRCH4	O75427	S68	AARSYDLSDITQADL	66 / 9 AA	73
Phosphosite 15:	GPR156	Q8NFN8	S480	ISDSKDFSDHLDSGC	100 / 6 AA	89
Phosphosite 16:	KLKB1	P03952	S455	YSGILNLSDITKDTP	71 / 7 AA	71
Phosphosite 17:	ZNF664	Q8N3J9	T70	DCGKDFSTTTKLNRH	75 / 8 AA	30
Phosphosite 18:	NSF	P46459	S228	GGLDKEFSDIFRRAF	62 / 8 AA	83
Phosphosite 19:	TTN	Q8WZ42	T14427	ELKFGDITKDSVHLT	83 / 6 AA	3816
Phosphosite 20:	ASCC3	Q8N3C0	S14	TGALRSFSNVTKQDN	50 / 8 AA	251