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:	S543
P-Site Sequence:	GAKGDKGSPGFYGKK
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	S543	GAKGDKGSPGFYGKK	100 / 9 AA	99
Phosphosite 1:	COL28A1	Q2UY09	S311	GIKGDKGSPGPYGPK	88 / 9 AA	117
Phosphosite 2:	COL4A1	P02462	S300	GDKGEKGSPGFPGEP	87 / 8 AA	161
Phosphosite 3:	FRMD4A	Q9P2Q2	S727	GSENDTGSPDFYTPR	75 / 8 AA	115
Phosphosite 4:	COL22A1	Q8NFW1	S1061	GPPGDKGSPGSRGLP	100 / 7 AA	161
Phosphosite 5:	COL9A2	Q14055	S431	GVKGDKGSPGKTGPR	100 / 7 AA	65
Phosphosite 6:	COL4A4	P53420	T994	GERGDKGTPGMQGRR	75 / 8 AA	164
Phosphosite 7:	COL21A1	Q96P44	S880	GRNGEKGSQGFGYPG	75 / 8 AA	99
Phosphosite 8:	COL4A2	P08572	S924	GLKGDRGSPGMDGFQ	75 / 8 AA	168
Phosphosite 9:	COL16A1	Q07092	S580	GASGDVGSPGFGLPG	87 / 8 AA	158
Phosphosite 10:	CCBE1	Q6UXH8	S266	GSPGPKGSPGFPGMP	87 / 8 AA	44
Phosphosite 11:	COL4A6	Q14031	S901	GPKGEKGSVGFVGFP	75 / 8 AA	164
Phosphosite 12:	COL27A1	Q8IZC6	S899	GKVGDKGSIGFPGPP	87 / 8 AA	187
Phosphosite 13:	CO3A1	P02461	S934	GQPGEKGSPGAQGPP	85 / 7 AA	139
Phosphosite 14:	COL4A2	P08572	S315	GLSGEKGSPGQKGSR	85 / 7 AA	168
Phosphosite 15:	TET3	O43151	S1414	FNSALKGSPGFQDKL	100 / 6 AA	179
Phosphosite 16:	COL4A5	P29400	S864	GPPGERGSPGIPGAP	62 / 8 AA	161
Phosphosite 17:	COL1A1	P02452	S936	GPAGEKGSPGADGPA	85 / 7 AA	139
Phosphosite 18:	COL9A2	Q14055	S642	GKDGDRGSPGAPGEA	85 / 7 AA	65
Phosphosite 19:	COL7A1	Q02388	S2273	GKDGDRGSPGVPGSP	85 / 7 AA	295
Phosphosite 20:	USP5	P45974	S630	TPDEPKGSLGFYGNE	85 / 7 AA	96