{"id":3564,"date":"2026-09-16T12:10:08","date_gmt":"2026-09-16T11:10:08","guid":{"rendered":"https:\/\/wheat-quail-856400.hostingersite.com\/produkt\/fbs-tetracycline-free-south-america-sterile-filtered\/"},"modified":"2026-10-26T13:15:57","modified_gmt":"2026-10-26T12:15:57","slug":"fks-tetrazyklinfrei-tet-free","status":"publish","type":"product","link":"https:\/\/seamlessbio.de\/de\/product\/fbs-tetracycline-free-south-america-sterile-filtered\/","title":{"rendered":"FBS tetrazyklinfrei | S\u00fcdamerika | 0,1 \u00b5m filtriert"},"content":{"rendered":"<style>\n.sb-pd{font-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",Roboto,sans-serif;max-width:100%;color:#202020;line-height:1.75}\n.sb-pd .def{background:#e9fbfa;border-left:4px solid #18b7b2;border-radius:0 10px 10px 0;padding:16px 20px;margin:0 0 28px}\n.sb-pd .def .lb{font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.09em;color:#139b97;display:block;margin-bottom:5px}\n.sb-pd .def p{font-size:15px;margin:0;font-weight:500}\n.sb-pd h2{font-size:21px;font-weight:800;margin:32px 0 10px;color:#111;border-bottom:2px solid #e2eceb;padding-bottom:7px}\n.sb-pd h3{font-size:15px;font-weight:700;color:#18b7b2;margin:18px 0 5px}\n.sb-pd p{margin:0 0 12px;font-size:15px}\n.sb-pd ul{margin:0 0 12px;padding-left:20px}\n.sb-pd li{margin-bottom:6px;font-size:14px}\n.sb-pd .cards{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:14px 0 20px}\n.sb-pd .card{background:#f1faf9;border:1px solid #daf3f2;border-top:3px solid #18b7b2;border-radius:0 0 10px 10px;padding:14px}\n.sb-pd .card h3{margin:0 0 5px;font-size:13px;color:#111}\n.sb-pd .card p{margin:0;font-size:12px;color:#5b6b71}\n.sb-pd table{width:100%;border-collapse:collapse;font-size:14px;margin:14px 0 20px}\n.sb-pd th{background:#18b7b2;color:#fff;text-align:left;padding:9px 13px;font-weight:700}\n.sb-pd td{padding:9px 13px;border-bottom:1px solid #e2eceb;vertical-align:top}\n.sb-pd tr:nth-child(even) td{background:#f8fffe}\n.sb-pd td:first-child{font-weight:600;color:#111;width:35%}\n.sb-pd .qa{background:#f8fffe;border:1px solid #daf3f2;border-radius:8px;padding:14px 16px;margin:10px 0}\n.sb-pd .qa .q{font-weight:700;color:#111;margin:0 0 5px;font-size:14px}\n.sb-pd .qa .a{margin:0;font-size:13px;color:#444}\n.sb-pd .cta{background:linear-gradient(135deg,#e4f6f5,#f4fbfb);border:1px solid rgba(24,183,178,.2);border-radius:12px;padding:20px;margin-top:28px;text-align:center}\n.sb-pd .cta h3{margin:0 0 7px;font-size:17px;color:#111}\n.sb-pd .cta p{margin:0 0 14px;font-size:13px;color:#5b6b71}\n.sb-pd .btn{display:inline-block;background:#18b7b2;color:#fff!important;padding:9px 20px;border-radius:7px;font-weight:700;font-size:13px;text-decoration:none!important;margin:0 4px}\n.sb-pd .btn-o{display:inline-block;border:2px solid #18b7b2;color:#18b7b2!important;padding:7px 20px;border-radius:7px;font-weight:700;font-size:13px;text-decoration:none!important;margin:0 4px}\n.sb-pd a{color:#18b7b2;font-weight:600}\n@media(max-width:600px){.sb-pd .cards{grid-template-columns:1fr}}\n<\/style>\n<div class=\"sb-pd\">\n<h2>Produkt\u00fcbersicht<\/h2>\n<p><strong>FKS tetrazyklinfrei von SeamlessBio<\/strong> ist f\u00f6tales K\u00e4lberserum, das gezielt auf Tetrazyklin-Antibiotika gepr\u00fcft und als frei davon best\u00e4tigt ist (&lt; Nachweisgrenze per HPLC\/ELISA). Erh\u00e4ltlich in <strong>s\u00fcdamerikanischer, US- und australischer<\/strong> Herkunft; jede Charge wird <strong>sterilfiltriert mit 0,1 \u00b5m<\/strong> Herkunft mit vollst\u00e4ndiger chargenspezifischer Dokumentation inklusive Tetrazyklin-Pr\u00fcfbericht. Es ist das erforderliche Serumsupplement f\u00fcr <strong>Induzierbare Genexpressionssysteme Tet-On \/ Tet-Off<\/strong>, bei denen schon Spuren von Tetrazyklin im Standard-FKS induzierbare Promotoren unterdr\u00fccken oder ausl\u00f6sen und Versuchsergebnisse unbrauchbar machen k\u00f6nnen. Mehr dazu, <a href=\"https:\/\/seamlessbio.de\/de\/what-is-fbs\/\">was FKS ist und wann Spezialqualit\u00e4ten n\u00f6tig sind<\/a>.<\/p>\n<h2>Technische Daten<\/h2>\n<table>\n<thead>\n<tr>\n<th>Parameter<\/th>\n<th>Spezifikation<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Herkunft<\/td>\n<td>S\u00fcdamerika, USA oder Australien \u2013 zertifizierte, r\u00fcckverfolgbare Spenderherden (bei Bestellung angeben)<\/td>\n<\/tr>\n<tr>\n<td>Tetrazyklinpr\u00fcfung<\/td>\n<td>Unter der Nachweisgrenze \u2013 HPLC oder kompetitiver ELISA<\/td>\n<\/tr>\n<tr>\n<td>Filtration<\/td>\n<td>0,1 \u00b5m sterilfiltriert<\/td>\n<\/tr>\n<tr>\n<td>Sterilit\u00e4t<\/td>\n<td>Getestet<\/td>\n<\/tr>\n<tr>\n<td>Mykoplasma<\/td>\n<td>Getestet<\/td>\n<\/tr>\n<tr>\n<td>Lagerung<\/td>\n<td>\u221220 \u00b0C (K\u00fchlkette erforderlich)<\/td>\n<\/tr>\n<tr>\n<td>Dokumentation<\/td>\n<td>CoA, BSE\/TSE-Erkl\u00e4rung, Tetrazyklin-Pr\u00fcfbericht; CoO auf Anfrage<\/td>\n<\/tr>\n<tr>\n<td>Regulatorisch<\/td>\n<td>Nur f\u00fcr Forschungszwecke (RUO)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Anwendungen<\/h2>\n<table>\n<thead>\n<tr>\n<th>Anwendung<\/th>\n<th>Beschreibung<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Genexpression mit Tet-On \/ Tet-Off<\/strong><\/td>\n<td>Erforderliche Serumqualit\u00e4t f\u00fcr Doxycyclin-regulierte, induzierbare Expressionssysteme \u2013 verhindert Hintergrundexpression durch Tetrazyklinspuren im Standard-FKS<\/td>\n<\/tr>\n<tr>\n<td><strong>Induzierbare CRISPR-Systeme<\/strong><\/td>\n<td>CRISPR-Konstrukte auf Basis des tetrazyklinresponsiven Elements (TRE), bei denen Tetrazyklinr\u00fcckst\u00e4nde die regulierte Expression von Guide-RNA oder Cas9 st\u00f6ren w\u00fcrden<\/td>\n<\/tr>\n<tr>\n<td><strong>Erzeugung stabiler Zelllinien<\/strong><\/td>\n<td>Erzeugung und Validierung induzierbarer stabiler Zelllinien mit reproduzierbarer, st\u00f6rungsfreier Induktionskinetik \u00fcber Passagen hinweg \u2013 siehe unser <a href=\"https:\/\/seamlessbio.de\/de\/fetales-kaelberserum\/\">gesamtes FKS-Portfolio<\/a><\/td>\n<\/tr>\n<tr>\n<td><strong>Allgemeine Zellkultur<\/strong><\/td>\n<td>Direkter Ersatz f\u00fcr Standard-FKS in allen Anwendungen, die nachweislich tetrazyklinfreies Serum erfordern \u2013 alle Standard-Qualit\u00e4tsparameter (Sterilit\u00e4t, Mykoplasmen, Wachstumsf\u00f6rderung) sind gleichwertig<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Verf\u00fcgbare Formate<\/h2>\n<table>\n<thead>\n<tr>\n<th>Format<\/th>\n<th>Gr\u00f6\u00dfe<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Flasche<\/td>\n<td>100 mL<\/td>\n<\/tr>\n<tr>\n<td>Flasche<\/td>\n<td>500 mL<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Die wichtigsten Vorteile<\/h2>\n<div class=\"cards\">\n<div class=\"card\">\n<h3>Sammelreservierung<\/h3>\n<p>Validierte Chargen bis zu 36 Monate reservieren \u2013 f\u00fcr reproduzierbare Langzeit-Zellkultur und induzierbare Expressionsworkflows.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>Vollst\u00e4ndige Dokumentation<\/h3>\n<p>CoA, CoO und Sicherheitsdatenblatt \u2013 aus nach ISO 9001 und ISO 13485 zertifizierten Partnerwerken. Inklusive Tetrazyklin-Pr\u00fcfbericht.<\/p>\n<\/div>\n<div class=\"card\">\n<h3>Lieferung EU &amp; Schweiz<\/h3>\n<p>Aus zertifizierten EU-Partnerwerken \u2013 schnelle Lieferung in der K\u00fchlkette in die EU, nach Gro\u00dfbritannien und in die Schweiz.<\/p>\n<\/div>\n<\/div>\n<h2>H\u00e4ufig gestellte Fragen<\/h2>\n<div class=\"qa\">\n<p class=\"q\">Warum l\u00e4sst sich Standard-FKS nicht mit Tet-On-\/Tet-Off-Systemen verwenden?<\/p>\n<p class=\"a\">Standard-FKS enth\u00e4lt h\u00e4ufig Spuren von Tetrazyklin-Antibiotika aus der Tierbehandlung. In Tet-On-Systemen aktiviert Doxycyclin (ein Tetrazyklin-Derivat) die Genexpression \u2013 Tetrazyklinr\u00fcckst\u00e4nde im Standard-FKS k\u00f6nnen daher auch ohne gewollte Induktion eine undichte Hintergrundexpression verursachen. In Tet-Off-Systemen tritt das umgekehrte Problem auf: Tetrazyklinspuren unterdr\u00fccken die Expression, obwohl induziert werden soll. Tetrazyklinfreies FKS beseitigt diese St\u00f6rung.<\/p>\n<\/div>\n<div class=\"qa\">\n<p class=\"q\">Wie wird die Tetrazyklinfreiheit dieses FKS nachgewiesen?<\/p>\n<p class=\"a\">Jede Charge wird per HPLC oder kompetitivem ELISA auf Tetrazyklin und Doxycyclin gepr\u00fcft; die Ergebnisse liegen unter der Nachweisgrenze. Das Pr\u00fcfzertifikat ist auf Anfrage mit dem CoA erh\u00e4ltlich. Das ist der anerkannte Standard f\u00fcr Tet-System-validiertes FKS in Hochschul- und Industrielaboren.<\/p>\n<\/div>\n<div class=\"qa\">\n<p class=\"q\">Welche Herkunft w\u00e4hle ich f\u00fcr FKS tetrazyklinfrei \u2013 S\u00fcdamerika, USA oder Australien?<\/p>\n<p class=\"a\">Alle drei Herk\u00fcnfte werden nach derselben Spezifikation auf Tetrazyklinfreiheit gepr\u00fcft und leisten in Tet-System-Anwendungen Gleichwertiges. S\u00fcdamerikanisches FKS ist die meistverwendete und kosteng\u00fcnstigste Wahl. Die US-Herkunft wird bevorzugt, wenn USDA-Dokumentation f\u00fcr Zulassungsunterlagen n\u00f6tig ist. Australisches FKS hat die niedrigste BSE\/TSE-Risikoeinstufung (OIE-zertifiziert, nie ein BSE-Fall) und wird f\u00fcr Impfstoffproduktion, GMP-Bioproduktion und die strengsten regulatorischen Umfelder bevorzugt. Nennen Sie Ihre gew\u00fcnschte Herkunft bei der Angebotsanfrage.<\/p>\n<\/div>\n<div class=\"qa\">\n<p class=\"q\">Ist eine Chargenreservierung f\u00fcr FKS tetrazyklinfrei m\u00f6glich?<\/p>\n<p class=\"a\">Ja \u2013 eine Chargenreservierung ist bis zu 36 Monate m\u00f6glich. F\u00fcr Tet-System-Versuche \u00fcber mehrere Monate oder mit konstanter Induktionskinetik empfehlen wir dringend, eine einzige validierte, tetrazyklinfreie Charge zu sichern. Nennen Sie uns gew\u00fcnschte Herkunft, Menge und Zeitplan.<\/p>\n<\/div>\n<div class=\"qa\">\n<p class=\"q\">Welche Dokumentation erhalte ich zu FKS tetrazyklinfrei?<\/p>\n<p class=\"a\">Jede Bestellung enth\u00e4lt ein Analysenzertifikat (CoA) mit Ergebnissen der Tetrazyklinpr\u00fcfung (HPLC oder ELISA, unter der Nachweisgrenze). BSE\/TSE-Erkl\u00e4rung, Herkunftszertifikat (CoO), Sterilit\u00e4tszertifikat und Mykoplasmen-Pr\u00fcfbericht auf Anfrage.<\/p>\n<\/div>\n<div class=\"cta\">\n<h3>Angebot oder Muster anfordern<\/h3>\n<p>Antwort in 48 h \u00b7 Lieferung EU &amp; Schweiz \u00b7 Chargenreservierung m\u00f6glich \u00b7 Vollst\u00e4ndige Dokumentation<\/p>\n<p>  <a href=\"https:\/\/seamlessbio.de\/de\/request-quote\/\" class=\"btn\">Angebot anfordern \u2192<\/a><br \/>\n  <a href=\"https:\/\/seamlessbio.de\/de\/fetales-kaelberserum\/\" class=\"btn-o\">FKS-Portfolio \u2192<\/a>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>FKS tetrazyklinfrei | S\u00fcdamerika | sterilfiltriert. Erh\u00e4ltlich in 50 ml, 100 ml, 500 ml. Preis auf Anfrage \u2013 kontaktieren Sie unser Team zu Verf\u00fcgbarkeit, Chargendokumentation und Lieferung. <\/p>\n<div style='margin-top:12px'><a href='https:\/\/seamlessbio.de\/de\/chargenreservierung\/' style='display:block;background:#fff;border:2px solid #18b7b2;color:#18b7b2;padding:10px 24px;border-radius:8px;font-weight:700;font-size:14px;text-decoration:none;text-align:center;'>Test Sample &amp; Batch Reservation \u2192<\/a><\/div>","protected":false},"featured_media":1315,"template":"","meta":{"_templately_pack_id":"","_templately_imported_at":"","_templately_source":"","_templately_import_session_id":""},"product_brand":[],"product_cat":[52],"product_tag":[55,147,148,58,85],"class_list":["post-3564","product","type-product","status-publish","has-post-thumbnail","product_cat-fetal-bovine-serum","product_tag-biological-research","product_tag-blood-products","product_tag-bovine-serum","product_tag-cell-culture","product_tag-fetal-bovine-serum","first","instock","taxable","shipping-taxable","product-type-simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Buy Tet-Free FBS (Tetracycline-Free) | EU Supplier | SeamlessBio<\/title>\n<meta name=\"description\" content=\"FBS Tetracycline Free (HPLC\/ELISA verified, &lt;detection limit) \u2014 South American, US and Australian origin, 0.1 \u00b5m sterile filtered. 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