{"id":501,"date":"2023-11-27T20:20:00","date_gmt":"2023-11-27T20:20:00","guid":{"rendered":"https:\/\/cellandcelldivision.com\/?p=501"},"modified":"2024-01-30T23:50:48","modified_gmt":"2024-01-30T23:50:48","slug":"page-77","status":"publish","type":"post","link":"https:\/\/cellandcelldivision.com\/?p=501","title":{"rendered":"Page 77"},"content":{"rendered":"\n<p class=\"has-text-align-center\">The contact between the F\u207a and F\u207b cells is accomplished by <strong>F-pilli<\/strong>. If the<br>F-factor is integrated in the bacterial chromosome (it can also be found in a<br>separate structure as is the case with the plasmids) and has a high<br>frequency of recombination, then the strains are designated with the<br>symbols<strong> Hfr (high frequency of recombination).<\/strong><\/p>\n\n\n\n<p>image a<\/p>\n\n\n\n<p>image b<\/p>\n\n\n\n<pre class=\"wp-block-verse has-text-align-center\">Figure 2\u201312. Electron micrographs of conjugation in cells of Escherichia\r\ncoli (After Anderson et al., 1957; Wollman and Jacob, 1959).<\/pre>\n\n\n\n<p class=\"has-text-align-center\">(A) Conjugation between K-12 Hfr H anf GF\u207b. The K-12 Hfr bacterium is<br>elongated and in the process of division, while the G F\u207b bacterium is<br>thick and rounded. The two bacteria are connected by a cytoplasmic<br>bridge. In the contact area the cell walls seem obliterated. The K-12 Hfr<br>bacterium is flagellated and is therefore mobile, while the G F\u207b<br>bacterium has no flagella and is not mobile; (B) Conjugation between<br>bacteria Hfr F\u207b\u03bb\u02b3 and F\u207b\u03bb\u02e2. The two bacteria are close to each other. In<br>the contact area the walls seem obliterated. The F\u207b bacterium is in a<br>process of division and is covered by a number of bacteriophages \u03bb,<br>which are fixed by the help of their tails.<br>The transfer of genetic factors (markers) takes place under certain<br>conditions and for a definite period of time. The method of starting and<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The contact between the F\u207a and F\u207b cells is accomplished by F-pilli. If theF-factor is integrated in the bacterial chromosome (it can also be found in aseparate structure as is the case with the plasmids) and has a highfrequency of recombination, then the strains are designated with thesymbols Hfr (high frequency of recombination). image a [&hellip;]<\/p>\n","protected":false},"author":2,"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":"default","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":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[6],"tags":[],"class_list":["post-501","post","type-post","status-publish","format-standard","hentry","category-book"],"_links":{"self":[{"href":"https:\/\/cellandcelldivision.com\/index.php?rest_route=\/wp\/v2\/posts\/501","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cellandcelldivision.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cellandcelldivision.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cellandcelldivision.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/cellandcelldivision.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=501"}],"version-history":[{"count":1,"href":"https:\/\/cellandcelldivision.com\/index.php?rest_route=\/wp\/v2\/posts\/501\/revisions"}],"predecessor-version":[{"id":514,"href":"https:\/\/cellandcelldivision.com\/index.php?rest_route=\/wp\/v2\/posts\/501\/revisions\/514"}],"wp:attachment":[{"href":"https:\/\/cellandcelldivision.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=501"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cellandcelldivision.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=501"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cellandcelldivision.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=501"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}