Polymers of protein consists of long chains of monomers called amino acids. There are 20 amino acids. The formation of different proteins entails the linkage of different amino acids through the dehydration synthesis process; these chains of amino acids are connected together by peptide bonds.
After protein synthesis, each protein has its own unique three-dimensional shape and a specific function. There are different types of proteins found in the body, such as structural, transport and catalysts. Structural proteins, such as collagen, elastin, provide support for the body. Catalysts proteins include enzymes, while a type of transport protein is hemoglobin.
Proteins can be either simple or conjugate protein. Simple proteins consist simply of amino acids, and conjugate proteins are composed of amino acids and non-protein components, which can be organic or inorganic substances.