Scientists now need to find the exact site of the gene, isolate it and determine what protein or product the gene makes, he said.

These extra proteins can make it difficult for the abnormal urea cycle to remove the byproducts.

Recent studies suggest that protein makes a meal more satiating, which in turn could help people maintain a healthy weight.

Apart from the food to supply the proteins to make that muscle, what else?

Eating more protein than your body can handle can make you very sick.

"I hope protein doesn't make you sleepy," he said finally.

Genes tell cells what to do by telling them which proteins to make and in what amounts.

This process isn't perfect and sometimes the proteins make mistakes and put the wrong nucleotide into the strand they are building.

He explained that certain proteins, called co-regulators, could make estrogen more or less potent in a particular tissue.

Regulators examine the genetic modification, its protein products, and any intended changes that those proteins make to the food.