Related Experiment Video

Updated: Jul 29, 2026

An Assay for Measuring the Activity of Escherichia coli Inducible Lysine Decarboxyase
08:08

An Assay for Measuring the Activity of Escherichia coli Inducible Lysine Decarboxyase

Published on: December 19, 2010

Amino acid decarboxylase enzymes--vital or irrelevant to gastric secretion?

F D Henman

    Digestion
    |January 1, 1975
    PubMed

    More Related Videos

    Enzymatic Cascade Reactions for the Synthesis of Chiral Amino Alcohols from L-lysine09:14

    Enzymatic Cascade Reactions for the Synthesis of Chiral Amino Alcohols from L-lysine

    Published on: February 16, 2018

    Extraction of Non-Protein Amino Acids from Cyanobacteria for Liquid Chromatography-Tandem Mass Spectrometry Analysis08:14

    Extraction of Non-Protein Amino Acids from Cyanobacteria for Liquid Chromatography-Tandem Mass Spectrometry Analysis

    Published on: December 9, 2022

    Related Concept Videos

    Stomach pH Regulation01:21

    Stomach pH Regulation

    The human body carefully regulates the internal pH of different organs to maintain homeostasis. For example, while the blood plasma maintains a neutral pH of 7, the stomach lumen has an acidic pH of 1.5 - 3.5. The low pH of stomach lumen helps kill pathogens in the food and break down complex food molecules.
    The acid-secreting gastric mucosal epithelial cells (parietal cells) lining the stomach lumen maintain the low pH in the lumen. Numerous ion transporters and channels on these parietal...
    Loss of Carboxy Group as CO2: Decarboxylation of β-Ketoacids01:02

    Loss of Carboxy Group as CO2: Decarboxylation of β-Ketoacids

    Carboxylic acids, upon heating, undergo a decarboxylation reaction by releasing carbon dioxide gas. Monocarboxylic acids do not undergo decarboxylation easily. However, a silver salt of carboxylic acid reacts with bromine or iodine under high temperature to release carbon dioxide gas and forms halide with one less carbon. This reaction is called the Hunsdiecker reaction.
    Pathophysiology of Peptic Ulcer Disease: Injurious Factors01:22

    Pathophysiology of Peptic Ulcer Disease: Injurious Factors

    Peptic ulcers are sores on the stomach's inner lining and the upper small intestine, which are the result of disruptions in the mucosal layer that houses parietal cells which produce gastric acid, and chief cells which secrete pepsinogen.
    In the antrum region, G cells secrete the gastrin hormone that binds to gastrin-cholecystokinin-B (CCK2) receptors on parietal and enterochromaffin-like (ECL) cells in the fundic glands. Simultaneously, the vagus nerve releases acetylcholine, which binds to M3...
    Gastric Phase of Digestion01:26

    Gastric Phase of Digestion

    The gastric phase of digestion begins as soon as food enters the stomach. The incoming food bolus triggers neural and hormonal mechanisms, which last approximately 3 to 4 hours. During this phase, the stomach undergoes significant changes to prepare the food for further digestion and absorption.
    When food enters the stomach, it stretches the stomach walls and activates stretch receptors. This triggers local reflexes of the enteric nervous system, mediated through the myenteric plexus. These...
    Amino Acid Catabolism01:18

    Amino Acid Catabolism

    Microorganisms rely on proteins as an essential carbon and energy source, particularly in environments with limited polysaccharides or lipids. However, proteins are too large to cross the plasma membrane unaided, necessitating enzymatic degradation. Microbes secrete extracellular proteases and peptidases that hydrolyze proteins into peptides, which can then be transported across the membrane. Once inside the cell, intracellular proteases degrade these peptides into free amino acids, which...
    Amino Acid Biosynthetic Pathways01:29

    Amino Acid Biosynthetic Pathways

    Amino acid biosynthesis is essential for cell growth, protein synthesis, and metabolic regulation. Cells generate essential and non-essential amino acids from metabolic intermediates to sustain vital biological functions. These intermediates originate from key metabolic pathways: glycolysis, the tricarboxylic acid (TCA) cycle, and the pentose phosphate pathway. Important precursors include α-ketoglutarate, pyruvate, oxaloacetate, phosphoenolpyruvate, and erythrose-4-phosphate, which provide...