Digestive Enzymes and Aids Salivary amylase
Location
Optimal pH
Substrates
Products
Salivary glands
6.8
Starch
Pancreatic amylase Maltase
Pancreas
6.7-7
Intestinal cells Stomach
6.1-6.8
Polysaccharide s Maltose
Maltose, glucose, and maltotriose Disaccharides and glucose Glucose
1.5-1.6
Protein
Amino acids
Pancreas Pancreas
7.8-8.7 8
Amino acids
Lipase
Pancreas
4.0-5.0
Protein Tryptophan, tyrosine, phenylalanine, leucine, and methionine Fats
Peptidase
Intestinal cells Pancreas Stomach Small Intestine Stomach
5.5
Proteins
Fatty acids and glycerol Amino acids
Protein
Amino acid Pepsinogen Amino acids, tyrosine Amino acids
HCI/pepsinogen/pe psin Trypsin Chymotrypsin
Secretin Gastrin Cholecystokinin Bile
3.5 6.7 8-9 5.5