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EC Number
pH Stability
pH Stability Maximum
Commentary
Reference
3.4.22.41
4
8
isozyme CF-4 is relatively stable at slight acidic and neutral pHs, but is comparatively unstable in acidic pHs, isozyme CF-11 is stable at acidic pHs, but is highly unstable in neutral and alkaline pH values
709866
3.4.22.41
4.5
-
best value for crude extracts
137265
3.4.22.41
5
-
4 h stable
137262
3.4.22.41
5
-
activity is greatly decreased at pH 5 (lysosomal pH) and below
708220
3.4.22.41
5.5
-
cathepsin F zymogen is inactive at pH 5.5
708053
3.4.22.41
7.2
-
half-life 2 min
137262
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