What can be reused or rebuilt is saved while true trash is destroyed by enzymes within the lysosome. It takes more than just Amino Acids, to make Proteins. We now know that the pancreas consists of several different types of cells that produce several different substances required for the digestion and proper utilization of food. Some of these substances are enzymes and some are hormones but each has a specific task. Insulin is a hormone and in order to understand how its production and structure relate to its function in human bodies, it is helpful to know a little about hormones in general.
Hormones act as chemical messengers.
They are manufactured by specialized cells in various tissues, usually glands and then exported to other cells in the body whose particular function requires their presence. Within the endocrine system, there are over 10 different glands that make over 30 different hormones. Insulin is a peptide hormone meaning that it is a protein compound made up of more than one chain of amino acids. Amino acids are the building blocks of body proteins and it is the number, type and sequence of specific amino acids that determine the individual structure and function of thousands of different proteins in all living organisms. Scattered throughout the pancreas are clusters of specialized cells called islets of Langerhans.