the activation was demonstrated by two distinct and independent collagenase assays : by recording with a spectrophotometer at 227 nm the enzyme-induced increase in ultraviolet difference absorbance of native type i collagen connected to the cleavage of collagen at 37 degrees c [ ( 1986 ) eur . j. biochem . 156 , 1-4 ] and by sds-polyacrylamide gel electrophoresis analysis of formation of specific products of collagen resulting from collagenase cleavage at 25 degrees c .
C0041455
type
C0009325
collagen