Why Enzyme Degradation

John Ballard CSIRO Division of Human Nutrition, Adelaide, S.A. 5000, Australia. 

Replacing one metabolic pathway with another more suitable to a new nutritional state involves both increases and decreases of enzyme activities. How does this occur  

In general terms, a cell has three ways by which its complement of enzymes can respond  

New enzymes can be synthesized and less appropriate enzymes degraded. 

Inactive enzymes can be reactivated and those not required can be converted to inactive or less active forms. 

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