Abstract：
:We have demonstrated that sugars and suger/zinc mixtures can be used to preserve the activity of dried phosphofructokinase (PFK) during long-term storage over CaSO4. After 9 weeks in the presence of either 200 mM sucrose or 200 mM trehalose little loss of PFK activity was noted, with almost 60% of the original prefreeze-dry activity recovered when samples were rehydrated. Even reducing sugars protected the dried enzyme throughout the entire storage period. Of the sugars tested, 200 mM lactose provided the most stability to PFK; at the end of the dry storage, over 80% of the initial activity was recovered. With either 200 mM maltose or 400 mM glucose, about 40% of the initial activity was recovered at the end of the experiment. With all the sugars tested, the addition of 0.6 mM Zn2+ to sugar/PFK mixtures enhanced the stability of the enzyme, and no long-term adverse effects of the metal ion on enzyme activity were noted.
journal_name
Cryobiologyjournal_title
Cryobiologyauthors
Carpenter JF,Martin B,Loomis SH,Crowe JHdoi
10.1016/0011-2240(88)90045-4subject
Has Abstractpub_date
1988-08-01 00:00:00pages
372-6issue
4eissn
0011-2240issn
1090-2392pii
0011-2240(88)90045-4journal_volume
25pub_type
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