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:	COL21A1
Human P-Site:	S654
P-Site Sequence:	GQPGTPGSKGSKGEP
UniProt:	Q96P44
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	COL21A1	Q96P44	S654	GQPGTPGSKGSKGEP	100 / 9 AA	99
Phosphosite 1:	COL11A1	P12107	S1448	GLKGDPGSKGEKGHP	77 / 9 AA	181
Phosphosite 2:	COL9A1	P20849	S336	GPDGSPGSIGSKGQK	77 / 9 AA	92
Phosphosite 3:	COL15A1	P39059	S997	GSWGLPGSKGEKGDQ	77 / 9 AA	142
Phosphosite 4:	COL16A1	Q07092	S350	GLPGPPGSKGEKGAR	77 / 9 AA	158
Phosphosite 5:	COL2A1	P02458	T727	GLPGTPGTDGPKGAS	66 / 9 AA	142
Phosphosite 6:	RIN1	Q13671	S330	EEEGVPGSRGSPATS	75 / 8 AA	84
Phosphosite 7:	COL4A1	P02462	S1205	GSPGIPGSKGEQGFM	85 / 7 AA	161
Phosphosite 8:	EMID2	Q96A83	S330	GPPGTPGSQGLAGER	85 / 7 AA	45
Phosphosite 9:	COL5A2	P05997	S319	GEVGAPGSKGEAGPT	85 / 7 AA	145
Phosphosite 10:	COL21A1	Q96P44	S531	GLHGMPGSKGEMGAK	66 / 9 AA	99
Phosphosite 11:	COL4A6	Q14031	S692	GTPGQPGSSGSKGEP	77 / 9 AA	164
Phosphosite 12:	COL4A5	P29400	S697	GLPGIPGSKGEPGIP	85 / 7 AA	161
Phosphosite 13:	EMID2	Q96A83	S218	GPAGPPGSKGDRGQT	66 / 9 AA	45
Phosphosite 14:	COL1A1	P02452	S441	GEPGAPGSKGDTGAK	85 / 7 AA	139
Phosphosite 15:	ARHGAP20	Q9P2F6	S281	SALLTPGSKDSTTPF	85 / 7 AA	133
Phosphosite 16:	COL21A1	Q96P44	T651	GSPGQPGTPGSKGSK	100 / 6 AA	99
Phosphosite 17:	COL4A3	Q01955	S1025	GNMGMPGSKGKRGTL	66 / 9 AA	162
Phosphosite 18:	GHDC	Q8N2G8	T179	GQVGTPGTKDPRALL	55 / 9 AA	58
Phosphosite 19:	COL4A3	Q01955	S1246	GNRGPPGSRGSPGAP	75 / 8 AA	162
Phosphosite 20:	HIVEP3	Q5T1R4	S385	QAFLSPGSKGSTESG	85 / 7 AA	259