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

Protein digestion occurs in the stomach and the duodenumthrough the action of three main enzymes: pepsin, secreted by the stomach, and trypsin and chymotrypsin, secreted by the pancreas.

Primarily in the stomach with pepsin, which produces smaller polypeptides. This enzyme works optimally at pH 2. Later on the polypeptides move on to the duodenum (pH around 6.2), where further digestion by various proteases, including trypsin, chymotrypsin, carboxypeptidase and aminopeptidase break down the polypeptides to amino acids. Not all polypeptides are easily broken down to amino acids: the keratins are very hard to digest and glycoproteins can be difficult to digest and usually move on and cause bloating in the lower intestine.

Digestion of all type of food needs mechanical process such chewing, swallowing and churning up and chemical reaction. protein digestion is also a progressive process until absorption stage. Its digestion starts from mouth where it breaks down by chewing and lubricated by salivary juice, then in stomach mechanically by churning up and chemically by gastric juice; while protein digestion in intestine is more chemical process which results in disruption of bonds by tyrpsin and chemotyrpsin and forms amino acids that could be assimilated by intestinal capillaries. For more clarification visit this link https://2012books.lardbucket.org/books/an-introduction-to-nutrition/s10-03-protein-digestion-and-absorpti.html

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.