Topoisomerases are essential enzymes that maintain the topology of DNA.

It is an essential enzyme in the human body.

Unable to produce an essential enzyme, my body allows a fatty material to accumulate uncontrollably in various places.

The essential enzyme is absent.

They may lack enzymes essential for glycolysis, such as phosphofructokinase-1.

It appears to be an essential enzyme.

After all, a steady rise in output per employee is an essential enzyme for a strong economy.

Organisms may not be able to grow with these essential enzymes deactivated.

A variety of mutations can lead to lowered production, activity, or stability of pyruvate kinase, an enzyme essential to glycolysis.

This gene encodes an essential enzyme of nucleotide metabolism.