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:	S681
P-Site Sequence:	GEPGATGSPGEPGYM
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	S681	GEPGATGSPGEPGYM	100 / 9 AA	99
Phosphosite 1:	COL6A6	A6NMZ7	S1708	GLPGEMGSPGEPGPP	77 / 9 AA	247
Phosphosite 2:	COL5A3	P25940	S1008	GPVGANGSPGERGPL	77 / 9 AA	172
Phosphosite 3:	COL4A4	P53420	Y212	GPAGPTGYPGEPGLV	77 / 9 AA	164
Phosphosite 4:	HIP1R	O75146	S1017	VLAGASGSPGEEVAI	87 / 8 AA	119
Phosphosite 5:	S1PR5	Q9H228	S381	DTSGSTGSPGAPTAA	77 / 9 AA	42
Phosphosite 6:	LAMA2	P24043	S1516	CAPGYTGSPGNPGGS	77 / 9 AA	343
Phosphosite 7:	FRMD8	Q9BZ67	S387	PQDSATGSPSDPSSS	66 / 9 AA	51
Phosphosite 8:	Asxl3	Q9C0F0	S1089	IVSGAMGSPGEGGKT	87 / 8 AA	242
Phosphosite 9:	COL22A1	Q8NFW1	S1334	GKNGSPGSPGEPGPS	77 / 9 AA	161
Phosphosite 10:	ZNF469	Q96JG9	S3223	SAGKAAGSPGDPWGQ	75 / 8 AA	259
Phosphosite 11:	COL4A3	Q01955	S857	GFPGETGSPGIPGHQ	77 / 9 AA	162
Phosphosite 12:	COL21A1	Q96P44	S645	GLMGSNGSPGQPGTP	66 / 9 AA	99
Phosphosite 13:	COL21A1	Q96P44	T679	LKGEPGATGSPGEPG	100 / 7 AA	99
Phosphosite 14:	RBM25	P49756	S677	LKLGASNSPGQPNSV	66 / 9 AA	100
Phosphosite 15:	FCN3	O75636	S52	SCPGAPGSPGEKGAP	87 / 8 AA	33
Phosphosite 16:	CO3A1	P02461	S469	GEDGKDGSPGEPGAN	77 / 9 AA	139
Phosphosite 17:	SMTN	P53814	S779	EKEGAAGSPGGPRAA	77 / 9 AA	100
Phosphosite 18:	THSD1	Q9NS62	S488	GGDGPTGSPGDTGIP	75 / 8 AA	95
Phosphosite 19:	ZNF750	Q32MQ0	S411	AGSAATGSPGRPSPT	87 / 8 AA	77
Phosphosite 20:	COL1A1	P02452	S543	GAKGLTGSPGSPGPD	77 / 9 AA	139