<P> Protein digestion occurs in the stomach and duodenum in which 3 main enzymes , pepsin secreted by the stomach and trypsin and chymotrypsin secreted by the pancreas , break down food proteins into polypeptides that are then broken down by various exopeptidases and dipeptidases into amino acids . The digestive enzymes however are mostly secreted as their inactive precursors , the zymogens . For example , trypsin is secreted by pancreas in the form of trypsinogen , which is activated in the duodenum by enterokinase to form trypsin . Trypsin then cleaves proteins to smaller polypeptides . </P>
<P> Protein digestion occurs in the stomach and duodenum in which 3 main enzymes , pepsin secreted by the stomach and trypsin and chymotrypsin secreted by the pancreas , break down food proteins into polypeptides that are then broken down by various exopeptidases and dipeptidases into amino acids . The digestive enzymes however are mostly secreted as their inactive precursors , the zymogens . For example , trypsin is secreted by pancreas in the form of trypsinogen , which is activated in the duodenum by enterokinase to form trypsin . Trypsin then cleaves proteins to smaller polypeptides . </P>
where is protein digested in the digestive system
where is protein digested in the digestive system
in the stomach and duodenum
in the stomach and duodenum