It is clear that the enzymes necessary for recombination are present in mammalian cells.

Victims of the disease are children whose bodies do not produce a necessary enzyme, said Glenn Kazo, vice president of corporate development for the company.

Because of defective genes, they lacked a necessary enzyme in their bodies.

And vaguely he remembered the rest, the details: all the intermediate steps, the necessary enzymes, the metals, ions, local factors.

Manufacturers rely on a variety of organisms to make the necessary enzymes.

In some cases, fitness may arise from the cell's ability to secrete necessary enzymes.

They fall into 14 major categories that must include "all the enzymes necessary for life," Dr. Venter noted.

An autoinducer is a transcriptional promoter of the enzymes necessary for bioluminescence.

It codes for an enzyme necessary for the production of keratan sulfate.

Hide beetles are the only beetle with the enzymes necessary for breaking down keratin, a protein component of hair.