3.2.1.38 activity is irreversibly lost within min in low salt buffers, below 0.5 M 727060 3.2.1.38 freezing and thawing inactivates 136317 3.2.1.38 repeated freezing and thawing cycles don't affect fucosidase II, 30% loss of activity for beta-fucosidase I after 3 cycles 136330 3.2.1.38 stable against repeated freezing and thawing cycles, activity unstable in SDS 136326