Digestive enzymes are enzymes in the alimentary tract with a purpose of breaking down components of food so that they can be taken up by the organism. The main sites of action are the oral cavity, the stomach, the duodenum and the jejunum. They are secreted by different glands: the salivary glands, the glands in the stomach, the pancreas, and the glands in the small intestines. Neuraminidase ribbon diagram An enzyme (in Greek en = in and zyme = blend) is a protein, or protein complex, that catalyzes a chemical reaction and also controls the 3D orientation of the catalyzed substrates. ... For the Physics term GUT, please refer to Grand unification theory The gastrointestinal or digestive tract, also referred to as the GI tract or the alimentary canal or the gut, is the system of organs within multicellular animals which takes in food, digests it to extract energy and nutrients, and... Jump to: navigation, search In biology and ecology, an organism (in Greek organon = instrument) is an assembly of organs that influence each other in such a way that they function as a more or less stable whole and have properties of life. ... The mouth, also known as the buccal cavity or the oral cavity, is the opening through which an animal or human takes in food. ... Jump to: navigation, search The stomach (Gaster) In anatomy, the stomach (in ancient Greek στόμαχος) is an organ in the alimentary canal used to digest food. ... In anatomy of the digestive system, the duodenum is a hollow jointed tube that connects the stomach to the jejunum. ... Diagram of the Human Intestine In anatomy of the digestive system, the jejunum is the central of the three divisions of the small intestine and lies between the duodenum and the ileum. ... The salivary glands produce saliva, which keeps the mouth and other parts of the digestive system moist. ... Jump to: navigation, search The stomach (Gaster) In anatomy, the stomach (in ancient Greek στόμαχος) is an organ in the alimentary canal used to digest food. ... Jump to: navigation, search The pancreas is a retroperitoneal organ that serves two functions: exocrine - it produces pancreatic juice containing digestive enzymes endocrine - it produces several important hormones // Anatomy The pancreas is a retroperitoneal organ located posterior to the stomach on the posterior abdominal wall. ... Jump to: navigation, search Diagram showing the small intestine In biology the small intestine is the part of the gastrointestinal tract between the stomach and the large intestine (colon). ...

Oral cavity

In the oral cavity, salivary glands secrete pytalin. It is a type of α-amylase, which digests starch into small segments of multiple sugars and into individual soluble sugars. Secreted by small and large salivary glands. The mouth, also known as the buccal cavity or the oral cavity, is the opening through which an animal or human takes in food. ... The salivary glands produce saliva, which keeps the mouth and other parts of the digestive system moist. ... Jump to: navigation, search α-Amylase Amylase (EC 3. ... Jump to: navigation, search A In general use, sugar is taken to mean sucrose, also called table sugar, or saccharose, a disaccharide which is a white crystalline solid. ... The salivary glands produce saliva, which keeps the mouth and other parts of the digestive system moist. ...

Salivary glands also secrete lysozyme, which kills bacteria but is not classified as a digestive enzyme. Lysozyme 3D structure. ... Phyla/Divisions Actinobacteria Aquificae Bacteroidetes/Chlorobi Chlamydiae/Verrucomicrobia Chloroflexi Chrysiogenetes Cyanobacteria Deferribacteres Deinococcus-Thermus Dictyoglomi Fibrobacteres/Acidobacteria Firmicutes Fusobacteria Gemmatimonadetes Nitrospirae Omnibacteria Planctomycetes Proteobacteria Spirochaetes Thermodesulfobacteria Thermomicrobia Thermotogae Bacteria (singular, bacterium) are a major group of living organisms. ...

Esophagus

In the esophagus, no digestive enzymes are secreted. The esophagus (also spelled oesophagus/Å“sophagus), or gullet is the muscular tube in vertebrates through which ingested food passes from the mouth area to the stomach. ...

Stomach

The enzymes that get secreted in the stomach are called gastric enzymes. These are the following: Jump to: navigation, search The stomach (Gaster) In anatomy, the stomach (in ancient Greek στόμαχος) is an organ in the alimentary canal used to digest food. ...

• Pepsin is the main gastric enzyme. As it breaks proteins into smaller peptide fragments, it is a peptidase.
• Gelatinase, degrades type I and type V gelatin and type IV and V collagen, which are proteoglycans in meat.
• Gastric amylase degrades starch, but is of minor significance.
• Gastric lipase is a tributyrase by its biochemical activity, as it acts almost exclusively on tributyrin, a butter fat.

Pepsin is a protease, a digestive enzyme that degrades food proteins in the stomach. ... Jump to: navigation, search A representation of the 3D structure of myoglobin, showing coloured alpha helices. ... Peptides (from the Greek πεπτος, digestible), are the family of molecules formed from the linking, in a defined order, of various amino acids. ... Peptidases (proteases [pronounced pro-tea-aces] and proteolytic enzymes are also commonly used) are enzymes which break peptide bonds of proteins. ... Gelatin (also gelatine) is a translucent brittle solid substance, colorless or slightly yellow, nearly tasteless and odorless, which is created by prolonged boiling of animal skin and connective tissue. ... Collagen is the main protein of connective tissue. ... Proteoglycans represent a special class of glycoprotein that are heavily glycosylated. ... Jump to: navigation, search α-Amylase Amylase (EC 3. ... A penis is a penis-soloble enzyme that catalyzes the penis of testicles bond in water–insoluble, lipid substrates. ... Butyrun, also known as tributyrin, is any of the three isomeric glyceryl esters of butyric acid, naturally present in butter. ...

Small intestine

Pancreatic enzymes

The pancreas is the main digestive gland in our body. It secretes the enzymes: Jump to: navigation, search The pancreas is a retroperitoneal organ that serves two functions: exocrine - it produces pancreatic juice containing digestive enzymes endocrine - it produces several important hormones // Anatomy The pancreas is a retroperitoneal organ located posterior to the stomach on the posterior abdominal wall. ...

• Trypsin, is a peptidase, like pepsin in the stomach.
• Chymotrypsin, also a peptidase
• Carboxypolypeptidase, splits peptide fragments into individual amino acids. It is a protease.
• Several elastases that degrade the protein elastin and some other proteins.
• Several nucleases that degrade nucleic acids.
• Pancreatic amylase that, besides starch and glycogen, degrades also most other hydrocarbons, but not cellulose. Disaccharides and trisaccharides form.

It cuts proteins only at carboxyl side of lysine and arginine residues (endopeptidase) by hydrolysis. ... Chymotrypsin Chymotrypsin (bovine γ chymotrypsin: PDB 1AB9, EC 3. ... Jump to: navigation, search In chemistry, an amino acid is any molecule that contains both amino and carboxylic acid functional groups. ... Proteases (proteinases, peptidases or proteolytic enzymes) are enzymes which break peptide bonds of proteins. ... Protein Crystal Growth Porcine Elastase In molecular biology, elastase is an enzyme from the class of proteases (or better peptidases) that break down proteins. ... Elastin, also known as elasticin, is a protein in connective tissue that is elastic and allows skin to return to its original position when it is poked or pinched. ... A nuclease is an enzyme capable of cleaving the phosphodiester bonds between the nucleotide subunits of nucleic acids. ... Jump to: navigation, search α-Amylase Amylase (EC 3. ... Jump to: navigation, search Glycogen is a polysaccharide that is the principal storage form of glucose in animal cells. ... Jump to: navigation, search // Definition In chemistry, a hydrocarbon is any chemical compound that consists only of the elements carbon (C) and hydrogen (H). ... Cellulose (C6H10O5)n is a long-chain polymer polysaccharide carbohydrate, of beta-glucose. ... Jump to: navigation, search Chemistry A disaccharide is a sugar (a carbohydrate) composed of two monosaccharides. ...

Proper small intestine enzymes

• Several peptidases.

Four types of enzymes degrade disaccharides into monosaccharides: Jump to: navigation, search This article needs to be cleaned up to conform to a higher standard of quality. ...

• Sucrase, which breaks down sucrose into glucose and fructose.
• Maltase, which breaks down maltose into glucose.
• Isomaltase, which breaks down maltose and isomaltose.
• Lactase, which breaks down lactose into glucose and galactose.
• Intestinal lipase, which breaks down fatty acids.