Inside fruits are proteins called 'enzymes' that break down the fruit.

The light causes a change in a protein called rhodopsin.

People who lack a protein called alpha 1 antitrypsin may be more likely to develop the disease.

The article described research that showed elevated levels of a protein called neurokinin-B.

The nails are made up of a protein called keratin.

One is a blood test for elevated levels of a protein called CA-125.

And it owns the rights to a human protein called telomerase.

These particular cells are considered dead, and they're filled with a protein called keratin.

But they say proteins called growth factors in the platelets may be involved.

The switches, large proteins called receptors, are usually found on a cell's surface.