POIKILOTHERMIC ADAPTATIONS 



Hexose monophosphate 

 shunt enzymes 



Acclimation Temperature and Enzyme 



Activity Per gm Wet Weight Per Cent by which 



or mg Protein Cold Exceeds Warm 



Cold 



Warm 



Glucose - 6-PO4 dehydrogenase 

 Crucian carp gill 

 (Ekberg, 1361) 



goldfish liver 

 (Murphy, 1961) 



6 - PO4 - gluconic dehydrogenase 

 Crucian carp gill 

 (Ekberg, 1S61) 



goldfish liver 

 (Murphy, 1961) 



Glycolytic enzymes 



-46% 



134% 



Table III. Activity of enzymes from poikilothermic vertebrates acclimated in 

 different temperatures. (--Values, inverse acclimation, or Precht's Type 5). (n.s. 

 not significant). Enzyme activities in different units of measurement. 



19 



