Is a chemical compound containing key elements of nitrogen, carbon, hydrogen and oxygen.
Actually, they were not teens at all, they had just turned 20 (there are 20 amino acids).
Human proteins are made up of only 20 different amino acids.
AFTER ALL IT IS ESSENTIAL TO EAT FOOD
Nine of these amino acids come from the food we eat (called essential amino acids) the rest are manufactured by our body. Protein within food is broken down into nine amino acids. These amino acids are then absorbed into the blood stream to be used to make useful human body proteins.
The remaining eleven amino acids are all produced in the liver and again are sent off into the blood stream.
The amino acids in the blood stream diffuse out of the blood stream and into cells and float around in the cytoplasm.