Lymphedema (lymphoedema in British English), also known as lymphatic obstruction, is a condition of localized fluid retention and tissue swelling caused by a compromised lymphatic system, which normally returns interstitial fluid to the thoracic duct and then the bloodstream.ymphedema (lymphoedema in British English), also known as lymphatic obstruction, is a condition of localized fluid retention and tissue swelling caused by a compromised lymphatic system, which normally returns interstitial fluid to the thoracic duct and then the bloodstream.
1 A polypeptide is a single linear chain of many amino acids, held together by amide bonds. 2  A protein is one or more polypeptide (more than about 50 amino acids long).  An oligopeptide consists of only a few amino acids (between two and twenty).
Proteins play important roles within our cells. Each protein is made up of at least one polypeptide chain. This lesson will discuss the synthesis of polypeptide chains and will emphasize the relationship between its structure and function.ach polypeptide chain is a series of amino acids joined together in a specific sequence. Because each amino acid has a unique R group, a particular amino acid sequence creates a polypeptide whose function is dependent upon its chemical structure.