Proteins are long, chain, high-molecular biopolymers consisting of amino acid residues connected by peptide bonds. Symbolically, you could say that protein is a chain of amino acids...

Proteins are the basis of biological functioning. As enzymes, they are the driving force of biochemical reactions, implementing the laws of biology. As structural elements, they are the main a component of our bones, muscles, hair, skin and blood vessels. As antibodies, they recognize antigens and enable the immune system to get rid of unwanted ones invaders. For these reasons, scientists sequenced the human genome, which is the blueprint for all proteins in biology. But even this was not enough to know protein secrets. So how can we understand proteins even better and learn more about how they function?

Knowing the sequence alone doesn't tell us much about what or how a given protein does. In order to perform their functions (e.g. as enzymes or antibodies), they must take on an appropriate form shape of a given task (so-called "fold"). So proteins are incredibly amazing machines: they 'fold' into shape before doing their job! This process of self-assembly of proteins is called protein folding.