<P> Pepsin is an enzyme that breaks down proteins into smaller peptides ( that is , a protease ) . It is produced in the stomach and is one of the main digestive enzymes in the digestive systems of humans and many other animals , where it helps digest the proteins in food . Pepsin has a three dimensional structure , of which one or more polypeptide chains twist and fold , bringing together a small number of amino acids to form the active site , or the location on the enzyme where the substrate binds and the reaction takes place . </P>
<P> Pepsin is an enzyme that breaks down proteins into smaller peptides ( that is , a protease ) . It is produced in the stomach and is one of the main digestive enzymes in the digestive systems of humans and many other animals , where it helps digest the proteins in food . Pepsin has a three dimensional structure , of which one or more polypeptide chains twist and fold , bringing together a small number of amino acids to form the active site , or the location on the enzyme where the substrate binds and the reaction takes place . </P>
where are trypsin and pepsin produced in the digestive system
where are trypsin and pepsin produced in the digestive system
stomach
stomach