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:	S531
P-Site Sequence:	GLHGMPGSKGEMGAK
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	S531	GLHGMPGSKGEMGAK	100 / 9 AA	99
Phosphosite 1:	COL28A1	Q2UY09	S479	AGQGLPGSKGEVGQM	77 / 9 AA	117
Phosphosite 2:	COL15A1	P39059	S997	GSWGLPGSKGEKGDQ	77 / 9 AA	142
Phosphosite 3:	COL9A1	P20849	S626	GPQGLPGSRGELGPV	66 / 9 AA	92
Phosphosite 4:	COL4A1	P02462	S1205	GSPGIPGSKGEQGFM	77 / 9 AA	161
Phosphosite 5:	COL4A5	P29400	S697	GLPGIPGSKGEPGIP	87 / 8 AA	161
Phosphosite 6:	COL4A2	P08572	S945	GRPGFPGSKGEAGFF	87 / 8 AA	168
Phosphosite 7:	COL23A1	Q86Y22	T467	GLIGLPGTKGEKGRP	66 / 9 AA	52
Phosphosite 8:	COL16A1	Q07092	T1516	GVRGLPGTKGEKGDI	66 / 9 AA	158
Phosphosite 9:	COL1A2	P08123	S878	GILGLPGSRGERGLP	66 / 9 AA	129
Phosphosite 10:	COL4A5	P29400	S543	GAPGFPGSKGEPGDI	87 / 8 AA	161
Phosphosite 11:	COL4A3	Q01955	S1025	GNMGMPGSKGKRGTL	100 / 7 AA	162
Phosphosite 12:	SHC1	P29353	S80	PAGGRPGSKGEPGRA	87 / 8 AA	63
Phosphosite 13:	COL4A1	P02462	S1303	GSPGITGSKGDMGPP	66 / 9 AA	161
Phosphosite 14:	COL5A2	P05997	S319	GEVGAPGSKGEAGPT	87 / 8 AA	145
Phosphosite 15:	SCN4B	Q8IWT1	S218	TENGLPGSKAEEKPP	75 / 8 AA	25
Phosphosite 16:	COL10A1	Q03692	S465	GIPGFPGSKGDPGSP	75 / 8 AA	66
Phosphosite 17:	FOG1	Q8IX07	S378	HMVCQPGSKGEIYSP	75 / 8 AA	105
Phosphosite 18:	COL16A1	Q07092	S350	GLPGPPGSKGEKGAR	77 / 9 AA	158
Phosphosite 19:	COL16A1	Q07092	S394	GPSGLPGSTGEKGQK	66 / 9 AA	158
Phosphosite 20:	COL27A1	Q8IZC6	S770	GLFGLPGSDGERGLP	66 / 9 AA	187