C-coll	Intact collagen
CB	C-coll in Tris buffer
CC	C-coll in collagenase solution in Tris buffer
D-coll	Hydrolyzed collagen
DB	D-coll in Tris buffer
DC	D-coll in collagenase solution in Tris buffer
MDPI	Multidisciplinary Digital Publishing Institute
SEC	Size-exclusion column
SDS–PAGE	Sodium dodecyl sulfate–polyacrylamide gel electrophoresis
HHP	High molecular weight hydrolyzed peptides
LHP	Low molecular weight hydrolyzed peptides