<!DOCTYPE html>
<html class="client-nojs vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-0 vector-toc-not-available vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-0 skin-theme-clientpref-day vector-sticky-header-enabled" lang="de" dir="ltr"><head>
<meta charset="UTF-8">
<title>Levane</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="icon" type="image/png" href="./_res_/favicon.png">
<link rel="canonical" href="https://de.wikipedia.org/wiki/Levane"> <link href="./_mw_/ext.cite.styles.css" rel="stylesheet" type="text/css">
<link href="./_mw_/ext.wikimediamessages.styles.css" rel="stylesheet" type="text/css">
<link href="./_mw_/skins.vector.icons.css" rel="stylesheet" type="text/css">
<link href="./_mw_/skins.vector.search.codex.styles.css" rel="stylesheet" type="text/css">
<link href="./_mw_/skins.vector.styles.css" rel="stylesheet" type="text/css">
<meta name="ResourceLoaderDynamicStyles" content="">
<link href="./_mw_/ext.gadget.citeRef.css" rel="stylesheet" type="text/css">
<link href="./_mw_/ext.gadget.defaultPlainlinks.css" rel="stylesheet" type="text/css">
<link href="./_mw_/ext.gadget.dewikiCommonHide.css" rel="stylesheet" type="text/css">
<link href="./_mw_/ext.gadget.dewikiCommonLayout.css" rel="stylesheet" type="text/css">
<link href="./_mw_/ext.gadget.dewikiCommonStyle.css" rel="stylesheet" type="text/css">
<link href="./_mw_/ext.gadget.dewikiDarkmode.css" rel="stylesheet" type="text/css">
<link href="./_mw_/ext.gadget.dewikiResponsive.css" rel="stylesheet" type="text/css">
<link href="./_mw_/ext.gadget.specialSearch.css" rel="stylesheet" type="text/css">
<link rel="stylesheet" type="text/css" href="./_mw_/site.styles.css">
<link rel="stylesheet" type="text/css" href="./_mw_/noscript.css">
<link rel="stylesheet" type="text/css" href="./_res_/footer.css">
<link rel="stylesheet" type="text/css" href="./_res_/vector-2022.css">
</head>
<body class="skin--responsive skin-vector skin-vector-search-vue mediawiki ltr sitedir-ltr mw-hide-empty-elt ns-0 ns-subject page-Levane rootpage-Levane skin-vector-2022 action-view">
<div class="mw-page-container">
<div class="mw-page-container-inner">
<div class="mw-content-container">
<main id="content" class="mw-body">
<header class="mw-body-header vector-page-titlebar">
<h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Levane</span></h1>
</header>
<a id="top"></a>
<div id="bodyContent" class="vector-body ve-init-mw-desktopArticleTarget-targetContainer" aria-labelledby="firstHeading" data-mw-ve-target-container="">
<div id="contentSub">
<div id="mw-content-subtitle"></div>
</div>
<div id="mw-content-text" class="mw-body-content mw-content-ltr" lang="de" dir="ltr"><div class="mw-content-ltr mw-parser-output" lang="de" dir="ltr">
<p><b>Levane</b> (synonym <i>Laevane</i>) sind eine Gruppe von <a href="Polysaccharid" class="mw-redirect" title="Polysaccharid">Polysacchariden</a>, die aus mehreren β-<small>D</small>-<a href="Fructose" title="Fructose">Fructose</a>-Einheiten aufgebaut sind und von verschiedenen <a href="Bakterien" title="Bakterien">Bakterien</a>, dem <a href="Zuckerrohr" title="Zuckerrohr">Zuckerrohr</a> und der <a href="Sojabohne" title="Sojabohne">Sojabohne</a> hergestellt werden.
</p>
<div class="mw-heading mw-heading2"><h2 id="Eigenschaften">Eigenschaften</h2></div>
<p>Levan kommt in verschiedenen Bakterien als Bestandteil der <a href="Glykokalyx" title="Glykokalyx">Glykokalyx</a> vor, z. B. in <i><a href="Bacillus_subtilis" title="Bacillus subtilis">Bacillus subtilis</a></i>, <i>Alcaligenes viscosus</i>, <i>Erwinia herbicola</i> oder <i><a href="Zymomonas_mobilis" title="Zymomonas mobilis">Zymomonas mobilis</a></i>. In Sojabohnen ist es ein Teil der <a href="Schleimstoffe" title="Schleimstoffe">Schleimstoffe</a> in den Bohnen. Das kürzeste Levan ist die 6-Kestose mit zwei Fructose-Einheiten und einer Glucose-Einheit.
</p><p>Die Biosynthese des Levans erfolgt durch Levan-<a href="Sucrase" class="mw-redirect" title="Sucrase">Sucrasen</a> aus <a href="Saccharose" title="Saccharose">Saccharose</a>. Levane sind <a href="Fructan" class="mw-redirect" title="Fructan">Fructane</a> mit einer β-(2→6)-<a href="Glykosidische_Bindung" class="mw-redirect" title="Glykosidische Bindung">Bindung</a>, teilweise sind sie β-(2→1) verzweigt, besitzen jedoch an der ersten Fructose-Einheit zusätzlich eine endständige <a href="Glucose" title="Glucose">Glucose</a>-Einheit aus der Saccharose.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-PMID_24031993_2-0" class="reference"><a href="#cite_note-PMID_24031993-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>
</p><p>Levane kommen in <a href="Natt%C5%8D" title="Nattō">Nattō</a> vor.<sup id="cite_ref-PMID_24031993_2-1" class="reference"><a href="#cite_note-PMID_24031993-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Levane sind unerwünschte Abfallprodukte bei der Verarbeitung von Zuckerrohrsaft und Sojabohnen.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>
</p>
<div class="mw-heading mw-heading2"><h2 id="Anwendung">Anwendung</h2></div>
<p>Levan wird zur <a href="Mikroverkapselung" title="Mikroverkapselung">Mikroverkapselung</a> verwendet.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup>
</p>
<div class="mw-heading mw-heading2"><h2 id="Belege">Belege</h2></div>
<ol class="references">
<li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text">J. Franken, B. A. Brandt, S. L. Tai, F. F. Bauer: <i>Biosynthesis of levan, a bacterial extracellular polysaccharide, in the yeast Saccharomyces cerevisiae.</i> In: <i>PloS one.</i> Band 8, Nummer 10, 2013, S. e77499. <a href="https://doi.org/10.1371/journal.pone.0077499" class="extiw external" title="doi:10.1371/journal.pone.0077499">doi:10.1371/journal.pone.0077499</a>. <a class="external mw-magiclink-pmid" rel="nofollow" href="https://www.ncbi.nlm.nih.gov/pubmed/24147008?dopt=Abstract">PMID 24147008</a>. <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3795680/">PMC 3795680</a> (freier Volltext).</span>
</li>
<li id="cite_note-PMID_24031993-2"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-PMID_24031993_2-0">a</a></sup> <sup><a href="#cite_ref-PMID_24031993_2-1">b</a></sup></span> <span class="reference-text">F. C. de Melo, C. T. Zaia, M. A. Celligoi: <i>Levan from Bacillus subtilis Natto: its effects in normal and in streptozotocin-diabetic rats.</i> In: <i>Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology].</i> Band 43, Nummer 4, Oktober 2012, S. 1613–1619. <a href="https://doi.org/10.1590/S1517-83822012000400046" class="extiw external" title="doi:10.1590/S1517-83822012000400046">doi:10.1590/S1517-83822012000400046</a>. <a class="external mw-magiclink-pmid" rel="nofollow" href="https://www.ncbi.nlm.nih.gov/pubmed/24031993?dopt=Abstract">PMID 24031993</a>. <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3769048/">PMC 3769048</a> (freier Volltext).</span>
</li>
<li id="cite_note-3"><span class="mw-cite-backlink"><a href="#cite_ref-3">↑</a></span> <span class="reference-text">Y. W. Han: <i>Microbial levan.</i> In: <i>Advances in applied microbiology.</i> Band 35, 1990, S. 171–194. <a class="external mw-magiclink-pmid" rel="nofollow" href="https://www.ncbi.nlm.nih.gov/pubmed/2205081?dopt=Abstract">PMID 2205081</a>.</span>
</li>
<li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">↑</a></span> <span class="reference-text">S. J. Kim, P. K. Bae, B. H. Chung: <i>Self-assembled levan nanoparticles for targeted breast cancer imaging.</i> In: <i>Chemical communications.</i> Band 51, Nummer 1, Januar 2015, S. 107–110. <a href="https://doi.org/10.1039/c4cc07679f" class="extiw external" title="doi:10.1039/c4cc07679f">doi:10.1039/c4cc07679f</a>. <a class="external mw-magiclink-pmid" rel="nofollow" href="https://www.ncbi.nlm.nih.gov/pubmed/25383444?dopt=Abstract">PMID 25383444</a>.</span>
</li>
</ol></div><!--htdig_noindex--><div><div class="zim-footer">
Dieser Artikel wurde von <a class="external text" title="Zuletzt bearbeitet am 2023-04-12" href="https://de.wikipedia.org/wiki/?title=Levane&oldid=232731595">Wikipedia</a> herausgegeben. Der Text ist unter <a class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.de">Creative Commons Attribution-Share Alike 4.0</a> verfügbar, sofern nicht anders angegeben. Für die Mediendateien können zusätzliche Bedingungen gelten.
</div>
</div><!--/htdig_noindex--></div>
</div>
</main>
</div>
</div>
</div>
<script src="./_webp_/webpHandler.js"></script>
</body></html>