{"id":34858,"date":"1998-01-01T00:00:00","date_gmt":"1998-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/caracterizacion-morfologica-y-bioquimica-del-enzima-fucosidasa-y-de-diversas-glicoproteinas-en-espermatozoides-y-epididimo-de-rata\/"},"modified":"1998-01-01T00:00:00","modified_gmt":"1998-01-01T00:00:00","slug":"caracterizacion-morfologica-y-bioquimica-del-enzima-fucosidasa-y-de-diversas-glicoproteinas-en-espermatozoides-y-epididimo-de-rata","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-vida\/caracterizacion-morfologica-y-bioquimica-del-enzima-fucosidasa-y-de-diversas-glicoproteinas-en-espermatozoides-y-epididimo-de-rata\/","title":{"rendered":"Caracterizacion morfologica y bioquimica del enzima fucosidasa y de diversas glicoproteinas en espermatozoides y epididimo de rata."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Mar\u00eda  Irene Abascal Ruiz <\/strong><\/h2>\n<p>La tesis doctoral se ha centrado en el estudio de dos aspectos diferentes del espermatozoide de rata. En primer lugar se ha procedido a la caracterizaci\u00f3n bioqu\u00edmica del enzima a-l-fucosidasa, a su localizaci\u00f3n ultraestructural mediante t\u00e9cnicas inmunocitoqu\u00edmicas en el espermatozoide y al estudio de los cambios que se producen en el enzima durante la maduraci\u00f3n epididimaria de los espermatozoides. As\u00ed, se ha localizado el enzima en la superficie de la regi\u00f3n convexa de la cabeza de los espermatozoides mediante la utilizaci\u00f3n de un anticuerpo anti-a-l-fucosidasa, no observ\u00e1ndose la presencia del enzima en el acrosoma de los espermatozoides. Su localizaci\u00f3n espec\u00edfica en la superficie de la regi\u00f3n convexa de la cabeza del espermatozoide, que es la zona de uni\u00f3n al ovocito en la rata, indicaria una posible relaci\u00f3n del enzima con este proceso. La caracterizaci\u00f3n bioqu\u00edmica del enzima determin\u00f3 que se encuentra unido a la membrana plasm\u00e1tica del espermatozoide mediante fuerzas i\u00f3nicas, no siendo una prote\u00edna integral de membrana.  posee dos subunidades de peso molecular 54 y 50 kda, un ph \u00f3ptimo de actividad pr\u00f3ximo a 7 y dos \u00fanicas isoformas de pl 7.2 y 5.2. Durante el tr\u00e1nsito epididimario del espermatozoide no se producen cambios en los pesos moleculares de las subunidades del enzima as\u00ed como tampoco en el ph \u00f3ptimo de actividad del mismo. Sin embargo se observa que la isoforma de pl 5.2 aparece por vez primera en la zona distal de la cola del epididimaria. Es en esta zona donde los espermatozoides adquieren movilidad y capacidad fecundante, por lo que esta isoforma puede estar relacionada con los procesos de maduraci\u00f3n que el espermatozoide sufre durante el tr\u00e1nsito epididimario y tener un papel en las interacciones espermatozoide- ovocito y\/o en el proceso de fecundaci\u00f3n. En segundo lugar, en la tesis se ha realizado la identificaci\u00f3n de diversos residuos oligosacar\u00eddicos mediante la utilizaci\u00f3n<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Caracterizacion morfologica y bioquimica del enzima fucosidasa y de diversas glicoproteinas en espermatozoides y epididimo de rata.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Caracterizacion morfologica y bioquimica del enzima fucosidasa y de diversas glicoproteinas en espermatozoides y epididimo de rata. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Mar\u00eda  Irene Abascal Ruiz <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Murcia<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1998<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Jose Ballesta German<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Francisco Hernandez Calvo <\/li>\n<li>Fracisco Solano Mu\u00f1oz (vocal)<\/li>\n<li>Antonio Campos Mu\u00f1oz (vocal)<\/li>\n<li>Eduardo Garcia Poblete (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Mar\u00eda Irene Abascal Ruiz La tesis doctoral se ha centrado en el estudio de dos aspectos diferentes [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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