Proteins are made up of amino acids, or organic compounds, that are linked together through peptide bonds. Different combinations of these amino acids make up all of the proteins from the fibrin that forms scabs on a cut finger to a protein that allows rattle snakes to detect body heat
The human body uses proteins for many things, including repairing and building tissues, acting as enzymes, aiding the immune system, and serving as hormones. Each of these important functions requires a slightly different form of protein. In spite of their differences in structure, all proteins contain the same basic sub-components
Proteins are something that we've heard about because they're an important part of our diet. If we look at this nutrition label for macaroni-and-cheese, we can see that, in addition to containing several grams of carbohydrates and fats, there also contain proteins
Small rivers and streams may join together to become larger rivers. Eventually all this water from rivers and streams will run into the ocean or an inland body of water like a lake.
