1.   Children who inherit the disease lack an enzyme that is a component of the white matter of the brain.

2.   GLA is an important fatty acid that some people have a hard time making because they lack sufficient enzymes.

3.   Humans cannot digest these wax esters because they lack the enzymes necessary to break the large molecules into smaller, absorbable components.

4.   Sufferers lack the enzyme that breaks down an amino acid called phenylalanine, or PHE, which is found in all proteins in varying amounts.

5.   The children lacked an enzyme, ADA, that protects T cells from a toxin in the body.

6.   Unlike cows and sheep, pigs lack the enzyme that breaks down phosphorus compounds in plant-based feed.

7.   But officials say that figure is cause for concern because nearly half of all Japanese lack an enzyme essential to breaking down alcohol.

8.   Children with the disease lack an enzyme to break down a fatty substance in brain cells.

9.   They lack an enzyme that allows them to digest lactose, the sugar in milk.

10.   The grass stays green because it lacks an enzyme that breaks down chlorophyll, the green pigment in plants used for photosynthesis.