{"id":794,"date":"2026-09-01T17:35:05","date_gmt":"2026-09-01T17:35:05","guid":{"rendered":"https:\/\/nhdbio.com\/resources\/oxytocin-nonapeptide-disulfide-stability-quality-guide\/"},"modified":"2026-09-08T07:30:41","modified_gmt":"2026-09-08T07:30:41","slug":"oxytocin-nonapeptide-disulfide-stability-quality-guide","status":"publish","type":"post","link":"https:\/\/nhdbio.com\/de\/oxytocin-nonapeptide-disulfide-stability-quality-guide\/","title":{"rendered":"Oxytocin-Identit\u00e4tsleitfaden: Nonapeptid, Disulfid und Stabilit\u00e4t"},"content":{"rendered":"<p class=\"pim-standfirst wp-block-paragraph\">Oxytocin ist ein zyklisches Nonapeptid mit einer Cys1-Cys6-Disulfidbr\u00fccke und einem C-terminalen Amid. Sequenz, Disulfidzustand, Gegenion, Aggregation und Wirksamkeit sind eindeutige Qualit\u00e4tsmerkmale.<\/p><div class=\"wp-block-group pim-key-takeaways\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Beweise auf einen Blick<\/h2><ul class=\"wp-block-list\"><li>PubChem listet die Sequenz CYIQNCPLG, die Formel C43H66N12O12S2 und das Molekulargewicht 1007.2 g\/mol auf.<\/li><li>Eine Abbaustudie ergab den schnellsten Verlust an intaktem Oxytocin bei pH 9.0 und den langsamsten unter getesteten Bedingungen bei pH 4.5.<\/li><li>Zu den identifizierten Abbauwegen geh\u00f6rten Desamidierung, ver\u00e4nderte Schwefelbr\u00fccken, Dimere, Beta-Eliminierung und gr\u00f6\u00dfere Aggregate.<\/li><\/ul><\/div><\/div><figure class=\"wp-block-image size-full pim-article-figure\"><img loading=\"lazy\" decoding=\"async\" width=\"1672\" height=\"941\" src=\"http:\/\/nhdbio.com\/wp-content\/uploads\/2026\/09\/oxytocin-quality.webp\" alt=\"Dokumentation der Peptidstabilit\u00e4t und HPLC-Workflow\" class=\"wp-image-778\" srcset=\"https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/09\/oxytocin-quality.webp 1672w, https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/09\/oxytocin-quality-300x169.webp 300w, https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/09\/oxytocin-quality-1024x576.webp 1024w, https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/09\/oxytocin-quality-768x432.webp 768w, https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/09\/oxytocin-quality-1536x864.webp 1536w\" sizes=\"auto, (max-width: 1672px) 100vw, 1672px\" \/><figcaption class=\"wp-element-caption\">Von AI generierte redaktionelle Illustration zur Veranschaulichung eines analytischen Arbeitsablaufs. Es stellt kein geliefertes Produkt, keine freigegebene Charge, keine genehmigte Formulierung oder kein Testergebnis dar.<\/figcaption><\/figure><h2 class=\"wp-block-heading\">Identit\u00e4tsdatensatz<\/h2><p class=\"wp-block-paragraph\">Die Acetatbezeichnung beschreibt den Gegenionkontext und sollte in die Gehaltsberechnungen einbezogen werden. Das C-terminale Amid des Peptids und das korrekte intramolekulare Disulfid sind f\u00fcr die Referenzidentit\u00e4t wesentlich.<\/p><div class=\"wp-block-group pim-evidence-table\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\"><div class=\"pim-evidence-row\"><strong>Sequenz<\/strong><span>Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH2<\/span><\/div><div class=\"pim-evidence-row\"><strong>Ring<\/strong><span>Disulfidbr\u00fccke zwischen Cys1 und Cys6<\/span><\/div><div class=\"pim-evidence-row\"><strong>Formel und Masse<\/strong><span>C43H66N12O12S2; 1007.2 g\/mol<\/span><\/div><div class=\"pim-evidence-row\"><strong>PubChem<\/strong><span>CID 439302<\/span><\/div><div class=\"pim-evidence-row\"><strong>Kritisch QC<\/strong><span>Intakte Masse, Disulfidzustand, verwandte Peptide, Aggregation, Gehalt, Wirksamkeit und Stabilit\u00e4t<\/span><\/div><\/div><\/div><h2 class=\"wp-block-heading\">Analyse- und Beweisgrenze<\/h2><p class=\"wp-block-paragraph\">Der beschleunigte Abbau bei den pH-Werten 2.0, 4.5, 7.0 und 9.0 zeigte pH- und temperaturabh\u00e4ngige Verluste pseudo-erster Ordnung. RP-HPLC, Gr\u00f6\u00dfenausschlussmethoden und MS\/MS beantworteten erg\u00e4nzende Fragen zu intakten Peptiden und Abbauprodukten.<\/p><p class=\"wp-block-paragraph\">Eine klare L\u00f6sung und eine passende Molek\u00fclmasse begr\u00fcnden weder die biologische Wirksamkeit noch schlie\u00dfen sie Aggregate geringer Konzentration aus. Fertigarzneimittel-USP-Einheiten geh\u00f6ren zu einer validierten Formulierung und sollten nicht f\u00fcr unabh\u00e4ngiges Forschungsmaterial abgeleitet werden.<\/p><h2 class=\"wp-block-heading\">Redaktionelle Regel<\/h2><p class=\"wp-block-paragraph\">Geben Sie das genaue Material, die Form, das Modell oder die Population und den Endpunkt an, die durch den zitierten Datensatz unterst\u00fctzt werden. Wandeln Sie keine mechanistische Plausibilit\u00e4t, ein Tierergebnis, ein offizielles Etikett eines Fertigarzneimittels oder einen analytischen Test in eine Aussage \u00fcber eine nicht verwandte Katalogcharge um.<\/p>","protected":false},"excerpt":{"rendered":"<p>Oxytocin ist ein zyklisches Nonapeptid mit einer Cys1-Cys6-Disulfidbr\u00fccke und einem C-terminalen Amid. Sequenz, Disulfidzustand, Gegenion, Aggregation und Wirksamkeit sind eindeutige Qualit\u00e4tsmerkmale.<\/p>","protected":false},"author":1,"featured_media":778,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"pim_family_ids":"354","pim_article_type":"Evidence and material-quality guide","pim_evidence_level":"PubChem and DailyMed identity plus primary degradation-kinetics research","pim_reviewer":"Site evidence editorial team","pim_reviewed_date":"2026-09-02","pim_editorial_note":"Source-checked on 2026-09-02. Null results, sample size, model\/population limits and regulatory scope are retained. This is not medical advice, a customer case or validation of a catalog lot.","pim_review_status":"reviewed","pim_review_reason":"Primary and official sources, numerical results, null findings, limitations, product-evidence boundary and image disclosure checked for batch 4.","pim_creation_method":"This article discusses the source records listed below, with the study models and limitations stated alongside the findings. AI-assisted drafting and image generation were used. The reference list identifies the records behind this article; it is not an independent peer review or verification of a supplied catalog lot.","pim_sources":"[{\"title\":\"DailyMed Oxytocin Injection, USP label\",\"url\":\"https:\/\/dailymed.nlm.nih.gov\/dailymed\/lookup.cfm?setid=4c4c4b69-8bf7-472c-aafe-29805ba5c965&version=2\",\"note\":\"Official U.S. prescription label, updated March 2025.\"},{\"title\":\"Oxytocin physiology, pharmacology and labor management\",\"url\":\"https:\/\/pubmed.ncbi.nlm.nih.gov\/37460365\/\",\"note\":\"2024 clinical review; PMID 37460365.\"},{\"title\":\"Oxytocin degradation kinetics and products\",\"url\":\"https:\/\/pubmed.ncbi.nlm.nih.gov\/19343484\/\",\"note\":\"Primary formulation-degradation study; PMID 19343484.\"},{\"title\":\"PubChem Oxytocin record\",\"url\":\"https:\/\/pubchem.ncbi.nlm.nih.gov\/compound\/439302\",\"note\":\"Sequence, disulfide, formula and molecular weight; CID 439302.\"}]","footnotes":""},"categories":[20],"tags":[],"class_list":["post-794","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-evidence-quality-guides"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Oxytocin Identity Guide: Nonapeptide, Disulfide and Stability<\/title>\n<meta name=\"description\" content=\"Oxytocin is a cyclic nonapeptide with a Cys1\u2013Cys6 disulfide bridge and a C-terminal amide. 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