Where are proteins located in the body?

Examine the keratin-containing skin, which is composed of polypeptides, or protein babies (so easy to say). Every single cell in your body is constructed from protein and linked with other macromolecules; the primary structure varies depending on the type of cell. For instance, fatty cells are primarily composed of fat, but they also contain protein to ensure that their enzyme (or at least their nucleus, organs that send the information signal) is active for the breakdown of fat.

If you say that the stomach and jejunum are where protein is digested, then you are correct.

Proteins can be found in cell membranes, cytoplasm, nucleus, mitochondria, and other cellular structures. They can also be found circulating in the blood and other bodily fluids, where they are involved in a variety of processes including immunological response, signaling, and transportation.