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:	S492
P-Site Sequence:	GTPGVPGSPGIQGAR
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	S492	GTPGVPGSPGIQGAR	100 / 9 AA	99
Phosphosite 1:	COL24A1	Q17RW2	S1346	GSSGLPGSPGIQGPK	88 / 9 AA	175
Phosphosite 2:	COL8A2	P25067	S514	GPPGVPGSPGITGPP	100 / 8 AA	67
Phosphosite 3:	EBF3	Q9H4W6	S506	ASLGVPGSPGFLNGS	77 / 9 AA	65
Phosphosite 4:	COL7A1	Q02388	S2279	GSPGVPGSPGLPGPV	77 / 9 AA	295
Phosphosite 5:	COL4A2	P08572	S1261	GERGPPGSPGLQGFP	77 / 9 AA	168
Phosphosite 6:	COL11A2	P13942	S1220	GEPGESGSPGIQGEP	77 / 9 AA	172
Phosphosite 7:	COL9A2	Q14055	S46	GPPGVPGSDGIDGDN	77 / 9 AA	65
Phosphosite 8:	GRAMD1A	Q96CP6	T57	EKGGVPGTPSTQSLG	66 / 9 AA	81
Phosphosite 9:	ARHGAP12	Q8IWW6	S262	ALPPLPGSPAIQING	75 / 8 AA	96
Phosphosite 10:	EMID1	Q96A84	S316	GPTGVPGSPGHIGPP	100 / 7 AA	45
Phosphosite 11:	CTHRC1	Q96CG8	T77	GANGIPGTPGIPGRD	66 / 9 AA	26
Phosphosite 12:	COL4A3	Q01955	S382	GPPGVPGSPGSSRPG	100 / 7 AA	162
Phosphosite 13:	COL4A1	P02462	S1095	GIPGMPGSPGLKGSP	66 / 9 AA	161
Phosphosite 14:	KNDC1	Q76NI1	S392	RGPGVPGSPGQPETS	100 / 7 AA	191
Phosphosite 15:	WDR33	Q9C0J8	S764	GIQGGPGSQGIQGPV	77 / 9 AA	146
Phosphosite 16:	COL28A1	Q2UY09	S758	GEIGEPGSPGKQGLQ	77 / 9 AA	117
Phosphosite 17:	COL7A1	Q02388	S2378	PGVGVPGSPGPPGPP	100 / 7 AA	295
Phosphosite 18:	COL4A4	P53420	S1425	GVDGVPGSPGPPGRK	100 / 7 AA	164
Phosphosite 19:	PHC2	Q8IXK0	S509	GGLPVPTSPNIQPSP	75 / 8 AA	91
Phosphosite 20:	COL4A4	P53420	S1217	GERGDPGSPGISPPG	87 / 8 AA	164