An introduction to entomology / John Henry Comstock

• Record Nr.: UNINA990002014080403321
• Autore: Comstock, John Henry
• Pubbl/distr/stampa: Ithaca (N.Y.) : Comstock, 1936
• Edizione: [8nd ed.]
• Descrizione fisica: 1044 p. : ill. ; 24 cm
• Disciplina: 595.7
• Locazione: DAGEN
• Collocazione: 61 IV A.4/20
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia

Subcellular fractionation [[electronic resource] ] : a practical approach / / edited by J.M. Graham and D. Rickwood

• Record Nr.: UNINA9910455468303321
• Pubbl/distr/stampa: Oxford ; ; New York, : IRL Press at Oxford University Press, c1997
• ISBN: 1-283-66474-7; 0-19-159161-0; 0-585-48392-2
• Descrizione fisica: 1 online resource (360 p.)
• Collana: The practical approach series
• Altri autori (Persone): GrahamJ. M <1943-> (John M.); RickwoodD (David)
• Disciplina: 571.6/5
• Soggetti: Subcellular fractionation; Electronic books.
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: Description based upon print version of record.
• Nota di bibliografia: Includes bibliographical references and index.
• Nota di contenuto: Cover; Contents; List of contributors; Abbreviations; 1. Homogenization of tissues and cells; 1. Introduction; 2. Aims of the homogenization procedure; 3. Influence of sample type; 4. Homogenization media; 5. Methods of homogenization; Type 1 homogenizers; Type 2 homogenizers; 6. Homogenization of tissues and cells; Mammalian liver; Brain; Muscle; Mammalian tissue culture cells; Plant organelles; Yeast; Other fungi and algae; Trypanosomes; Bacteria; References; 2. Isolation of subcellular fractions; 1. Introduction; 2. Composition of a tissue homogenate; 3. Properties of cell organelles; Factors affecting organelle density and size4. Centrifugal methods for the separation of organelles; Separation by size; Separation by density; Density perturbation; 5. Non-centrifugal procedures; Immunoisolation; Separation by electrophoresis; 6. Identification of separated material; Marker enzymes; Introduced markers for endocytic and exocytic pathways; Characteristic non-enzymatic proteins; 7. Assessment of the purity of fractions; Purity and purification; Problems from cell heterogeneity within tissues; Problems arising from organelle fragmentation; Missorting in the exocytic and endocytic pathways8. Fractionation problems; No separation; Aggregation following resuspension of a fraction; Poor recovery of markers; Damage to cell structures; 9. A systematic approach to cell fractionation; Preliminary studies; Determination of the properties of components of the homogenate; Method development; Simplification of the separation; References; 3. Isolation and characterization of nuclei and nuclear subfractions; 1. Introduction; 2. Methods of preparing purified nuclei; Types of cells and tissue samples; Homogenization media; Homogenization methodsCentrifugation conditions; Assays of nuclear purity; 3. Methods for purifying metaphase chromosomes; 4. Isolation of nuclear subfractions; Preparation of nucleoli; Preparation of nuclear membranes; Isolation of nuclear matrix; Preparation of nucleoids; 5. Isolation of nucleoprotein complexes; Isolation of polynucleosomes of chromatin; Ribonucleoproteins; 6. Isolation of nuclear macromolecules; Isolation of nuclear proteins; Isolation of nuclear RNA; Isolation of DNA; 7. Functional assays of nuclei; Analysis of DNA-binding proteins; Transcription assays; References; 4. Subcellular fractionation of mitochondria1. Introduction; 2. Purification of mitochondria from various eukaryotic sources; Introduction; Protocols for purification of mitochondria from several eukaryotic sources; Further purification of mitochondrial fractions; 3. Determination of mitochondrial purity; Introduction; Use of the oxygen electrode to determine mitochondrial integrity; Determination of the integrity of the mitochondrial outer membrane; Glucose hexokinase trap method for estimation of P:O ratios; 4. Subfractionation of mitochondria; Preparation of submitochondrial particles by sonication
• Sommario/riassunto: Many investigations into the structure and function of cells and tissues require the isolation of a particular membrane or subcellular component (organelle). This book covers all the necessary aspects, from breaking up the cells (homogenization), via a variety of separation techniques (the isolation and fractionation chapters), to characterization of the separated organelles.