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Pepsin A: Formed from pig pepsinogen by cleavage of one peptide bond. The enzyme is a single polypeptide chain and is inhibited by methyl 2-diaazoacetamidohexanoate. It cleaves peptides preferentially at the carbonyl linkages of phenylalanine or leucine and acts as the principal digestive enzyme of gastric juice.
 JoVE Bioengineering

Fabrication of Extracellular Matrix-derived Foams and Microcarriers as Tissue-specific Cell Culture and Delivery Platforms

1Biomedical Engineering Graduate Program, The University of Western Ontario, 2Department of Anatomy & Cell Biology, Schulich School of Medicine & Dentistry, The University of Western Ontario, 3Department of Chemical Engineering, Queen's University, 4Department of Chemical & Biochemical Engineering, Faculty of Engineering, The University of Western Ontario


JoVE 55436

 JoVE Bioengineering

A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time

1Transfusion Research Center, Belgian Red Cross-Flanders, 2Faculty of Medicine and Health Sciences, Ghent University, 3Blood Service, Belgian Red Cross-Flanders, 4Department of Public Health and Primary Care, KULeuven - University of Leuven


JoVE 55351

 JoVE Biology

Analysis of Single-cell Gene Transcription by RNA Fluorescent In Situ Hybridization (FISH)

1Centre for Medical Parasitology, Department of International Health, Immunology & Microbiology, Faculty of Health Sciences, University of Copenhagen, 2Department of Infectious Diseases, Copenhagen University Hospital (Rigshospitalet), 3Institute of Infection and Immunology Research, School of Biology, University of Edinburgh


JoVE 4073

 JoVE In-Press

Protocol for HER2 FISH Using a Non-cross-linking, Formalin-free Tissue Fixative to Combine Advantages of Cryo-preservation and Formalin Fixation

1Christian Doppler Laboratory for Biospecimen Research and Biobanking Technologies, Institute of Pathology, Medical University Graz, 2Institute of Pathology, Medical University Graz, 3Research and Development, Qiagen GmbH

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JoVE 55885

 JoVE Biology

Quantification of Proteins Using Peptide Immunoaffinity Enrichment Coupled with Mass Spectrometry

1Clinical Research Division, Fred Hutchinson Cancer Research Center - FHCRC, 2Department of Biochemistry and Microbiology, University of Victoria, 3Broad Institute of MIT and Harvard, 4Genome BC Proteomics Centre, University of Victoria, 5Plasma Proteome Institute


JoVE 2812

 Science Education: Essentials of Genetics

Cytogenetics

JoVE Science Education

Cytogenetics is the field of study devoted to chromosomes, and involves the direct observation of a cell’s chromosomal number and structure, together known as its karyotype. Many chromosomal abnormalities are associated with disease. Each chromosome in a karyotype can be stained with a variety of dyes to give unique banding patterns. More recent techniques, including comparative genomic hybridization and fluorescence in situ hybridization (FISH), allow for detecting specific chromosomal features or abnormalities.This video will begin by examining the principles of these classical and modern cytogenetics techniques. This is followed by an examination of a general protocol for performing FISH. Finally, several examples of how karyotyping can be applied to various medical applications are presented.

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 JoVE Developmental Biology

Biosensing Motor Neuron Membrane Potential in Live Zebrafish Embryos

1Department of Medical Biotechnology and Translational Medicine, Università degli Studi di Milano, 2Department of Neuroscience; Department of Cell Biology, Howard Hughes Medical Institute, Yale University School of Medicine, 3Program in Cellular Neuroscience, Neurodegeneration and Repair, Yale University School of Medicine, 4Department of BioSciences, Università degli Studi di Milano


JoVE 55297

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 JoVE Developmental Biology

Acute and Chronic Models of Hyperglycemia in Zebrafish: A Method to Assess the Impact of Hyperglycemia on Neurogenesis and the Biodistribution of Radiolabeled Molecules

1UMR 1188 Diabète athérothombose Réunion Océan Indien (DéTROI), Saint-Denis de La Réunion, France, Université de La Réunion, INSERM, 2RIPA (Radiochimie et Imagerie du Petit Animal), Cyclotron de la Réunion Océan Indien CYROI, 3CHU de La Réunion


JoVE 55203

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 JoVE Biology

Glucose Uptake Measurement and Response to Insulin Stimulation in In Vitro Cultured Human Primary Myotubes

1CarMeN Laboratory, INSERM U1060, INRA 1397, University of Lyon, 2Department of digestive and bariatric surgery, Obesity Integrated Center, University Hospital of Edouard Herriot, Hospices Civils de Lyon, Lyon 1 University, 3Division of Endocrinology, Diabetes, Hypertension and Nutrition, Department of Clinical Medicine, Faculty of Medicine, University of Geneva


JoVE 55743

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 JoVE Engineering

Scalable Solution-processed Fabrication Strategy for High-performance, Flexible, Transparent Electrodes with Embedded Metal Mesh

1Department of Mechanical Engineering, University of Hong Kong, 2Department of Mechanical Engineering, University of Michigan, 3Department of Electrical Engineering and Computer Science, University of Michigan, 4Department of Chemistry, University of Hong Kong, 5HKU-Shenzhen Institute of Research and Innovation


JoVE 56019

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 JoVE Immunology and Infection

An All-on-chip Method for Rapid Neutrophil Chemotaxis Analysis Directly from a Drop of Blood

1Institute of Applied Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, 2University of Science and Technology of China, 3Department of Physics and Astronomy, University of Manitoba, 4Department of Biosystems Engineering, University of Manitoba, 5Seven Oaks General Hospital, 6Department of Immunology, University of Manitoba, 7Department of Biological Sciences, University of Manitoba


JoVE 55615

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 JoVE Cancer Research

A Unified Methodological Framework for Vestibular Schwannoma Research

1Eaton Peabody Laboratories, Department of Otolaryngology, Massachusetts Eye and Ear, 2Department of Otolaryngology, Harvard Medical School, 3Department of Otolaryngology, Vienna General Hospital, Medical University of Vienna, 4Program in Speech and Hearing Bioscience and Technology, Harvard Medical School


JoVE 55827

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