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:	S591
P-Site Sequence:	GFKGEAGSPGAPGQD
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	S591	GFKGEAGSPGAPGQD	100 / 9 AA	99
Phosphosite 1:	C1QTNF6	Q9BXI9	S115	GDKGEMGSPGAPCQK	88 / 9 AA	29
Phosphosite 2:	CO3A1	P02461	S1039	GDRGENGSPGAPGAP	88 / 9 AA	139
Phosphosite 3:	COL4A5	P29400	S565	GDKGELGSPGAPGLP	88 / 9 AA	161
Phosphosite 4:	COL4A3	Q01955	S857	GFPGETGSPGIPGHQ	77 / 9 AA	162
Phosphosite 5:	COL9A2	Q14055	S642	GKDGDRGSPGAPGEA	77 / 9 AA	65
Phosphosite 6:	COL4A6	Q14031	S802	GPKGERGSPGTPGQV	77 / 9 AA	164
Phosphosite 7:	COL4A4	P53420	S1055	GDQGEPGSPGPPGFS	77 / 9 AA	164
Phosphosite 8:	COL6A6	A6NMZ7	S1708	GLPGEMGSPGEPGPP	77 / 9 AA	247
Phosphosite 9:	COL4A4	P53420	S1092	GPKGEPGSPGCPGHF	77 / 9 AA	164
Phosphosite 10:	COL6A2	P12110	S362	GYPGEAGSPGERGDQ	77 / 9 AA	109
Phosphosite 11:	SYT7	O43581	S9	YRDPEAASPGAPSRD	87 / 8 AA	46
Phosphosite 12:	COL22A1	Q8NFW1	S1355	GSKGENGSPGLPGFL	77 / 9 AA	161
Phosphosite 13:	DAB2IP	Q5VWQ8	S763	TLDGEAGSPAGPDVL	77 / 9 AA	132
Phosphosite 14:	COL4A5	P29400	S864	GPPGERGSPGIPGAP	77 / 9 AA	161
Phosphosite 15:	S1PR5	Q9H228	S381	DTSGSTGSPGAPTAA	77 / 9 AA	42
Phosphosite 16:	COL4A3	Q01955	S603	GPPGDPGSPGSPGPA	66 / 9 AA	162
Phosphosite 17:	CO3A1	P02461	S865	GVKGERGSPGGPGAA	77 / 9 AA	139
Phosphosite 18:	COL2A1	P02458	S709	GFPGERGSPGAQGLQ	77 / 9 AA	142
Phosphosite 19:	COL10A1	Q03692	S471	GSKGDPGSPGPPGPA	66 / 9 AA	66
Phosphosite 20:	CO3A1	P02461	S934	GQPGEKGSPGAQGPP	77 / 9 AA	139