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:	Y504
P-Site Sequence:	GARGLPGYKGEPGRD
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	Y504	GARGLPGYKGEPGRD	100 / 9 AA	99
Phosphosite 1:	COL28A1	Q2UY09	Y290	GPGGIPGYKGDKGER	75 / 8 AA	117
Phosphosite 2:	COL4A5	P29400	S697	GLPGIPGSKGEPGIP	77 / 9 AA	161
Phosphosite 3:	SMG9	Q9H0W8	Y460	LFSLLPGYRGHPSFQ	75 / 8 AA	58
Phosphosite 4:	COL18A1	P39060	Y1216	GPYGRPGYKGEIGFP	87 / 8 AA	178
Phosphosite 5:	COL4A5	P29400	S543	GAPGFPGSKGEPGDI	77 / 9 AA	161
Phosphosite 6:	COL4A5	P29400	Y1090	GEPGLPGYPGNPGIK	77 / 9 AA	161
Phosphosite 7:	COL23A1	Q86Y22	T467	GLIGLPGTKGEKGRP	87 / 8 AA	52
Phosphosite 8:	COL16A1	Q07092	T1516	GVRGLPGTKGEKGDI	87 / 8 AA	158
Phosphosite 9:	AACS	Q86V21	Y455	HNFSLPVYKGEIQAR	75 / 8 AA	75
Phosphosite 10:	ITPA	Q9BY32	Y45	QKIDLPEYQGEPDEI	66 / 9 AA	21
Phosphosite 11:	COL28A1	Q2UY09	S479	AGQGLPGSKGEVGQM	87 / 8 AA	117
Phosphosite 12:	COL15A1	P39059	S997	GSWGLPGSKGEKGDQ	87 / 8 AA	142
Phosphosite 13:	COL4A4	P53420	Y844	GQPGLPGYPGSPGAP	77 / 9 AA	164
Phosphosite 14:	COL4A3	Q01955	Y456	GDHGLPGYLGSPGIP	77 / 9 AA	162
Phosphosite 15:	SYTL4	Q96C24	S494	ESPTGLPSHKGELVV	75 / 8 AA	76
Phosphosite 16:	SLIT2	O94813	Y1151	ICQCLPGYQGEKCEK	85 / 7 AA	170
Phosphosite 17:	C1QTNF6	Q9BXI9	Y91	GPMGLPGYMGREGPQ	85 / 7 AA	29
Phosphosite 18:	COL10A1	Q03692	S465	GIPGFPGSKGDPGSP	66 / 9 AA	66
Phosphosite 19:	CCNJ	Q5T5M9	Y30	KELKLPSYKGQSPQL	62 / 8 AA	43
Phosphosite 20:	SHC1	P29353	S80	PAGGRPGSKGEPGRA	77 / 9 AA	63