# Proteins Unveiled: Exploring Their Fundamental Building Blocks Proteins, essential for various biological functions, are composed of amino acids. **[what are the building blocks of proteins](https://moneypip.com/what-are-the-building-blocks-of-proteins/)**. There are 20 standard amino acids, each with a unique side chain. These side chains determine the specific properties of the amino acid, influencing the overall structure and function of the protein. When linked together in a specific sequence, amino acids form peptide chains, which then fold and interact to create the three-dimensional structure of a protein. This structure ultimately dictates the protein's function, ranging from enzymes and hormones to structural components within cells. Understanding amino acids is key to comprehending the complexity and versatility of proteins in living organisms.