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Cholera Toxin: An Enterotoxin from Vibrio cholerae. It consists of two major protomers, the heavy (H) or A subunit and the B protomer which consists of 5 light (L) or B subunits. The catalytic A subunit is proteolytically cleaved into fragments A1 and A2. The A1 fragment is a Mono(Adp-ribose) Transferase. The B protomer binds cholera toxin to intestinal epithelial cells, and facilitates the uptake of the A1 fragment. The A1 catalyzed transfer of Adp-ribose to the alpha subunits of heterotrimeric G Proteins activates the production of Cyclic amp. Increased levels of cyclic Amp are thought to modulate release of fluid and electrolytes from intestinal crypt cells.

Analyzing the Communication Between Monocytes and Primary Breast Cancer Cells in an Extracellular Matrix Extract (ECME)-based Three-dimensional System

1Unidad de Investigación en Virología y Cáncer, Hospital Infantil de México Federico Gómez, 2Programa de Doctorado en Ciencias Biomédicas, Facultad de Medicina, Universidad Nacional Autónoma de México

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JoVE 56589


 JoVE In-Press

Forskolin-induced Swelling in Intestinal Organoids: An In Vitro Assay for Assessing Drug Response in Cystic Fibrosis Patients

1Foundation Hubrecht Organoid Technology, 2Department of Pediatric Pulmonology, Regenerative Medicine Centre Utrecht, Wilhelmina Children's Hospital, University Medical Centre Utrecht, 3Department of Stem Cells and Cancer, Walter and Eliza Hall Institute of Medical Research, 4Hubrecht Institute for Developmental Biology and Stem Cell Research, University Medical Centre Utrecht

JoVE 55159


 Medicine

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