{"id":790,"date":"2026-09-01T17:35:05","date_gmt":"2026-09-01T17:35:05","guid":{"rendered":"https:\/\/nhdbio.com\/resources\/igf-1-lr3-83-amino-acid-identity-quality-guide\/"},"modified":"2026-09-08T07:30:41","modified_gmt":"2026-09-08T07:30:41","slug":"igf-1-lr3-83-amino-acid-identity-quality-guide","status":"publish","type":"post","link":"https:\/\/nhdbio.com\/fr\/igf-1-lr3-83-amino-acid-identity-quality-guide\/","title":{"rendered":"Guide d'identit\u00e9 IGF-1 LR3\u00a0: Arg3, extension N-terminale et prot\u00e9ine QC"},"content":{"rendered":"<p class=\"pim-standfirst wp-block-paragraph\">Long R3 IGF-1 est un analogue de l'acide amin\u00e9 83 IGF-1 avec une substitution Arg en position 3 et une extension N-terminale du r\u00e9sidu 13. Il n\u2019est pas interchangeable avec le r\u00e9sidu 70 natif IGF-1.<\/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\">Les preuves en un coup d'\u0153il<\/h2><ul class=\"wp-block-list\"><li>La notice du catalogue utilise un poids mol\u00e9culaire approximatif de 9117.5 g\/mol pour l\u2019analogue des r\u00e9sidus 83.<\/li><li>La s\u00e9quence, la connectivit\u00e9 disulfure, le repliement, l'agr\u00e9gation et la bioactivit\u00e9 sont tous importants pour une prot\u00e9ine recombinante.<\/li><li>Une masse intacte et correcte n\u2019\u00e9tablit pas un pliage ou une puissance de type natif.<\/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\/igf1-lr3-quality.webp\" alt=\"Sc\u00e8ne de laboratoire documentaire de caract\u00e9risation des prot\u00e9ines\" class=\"wp-image-774\" srcset=\"https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/09\/igf1-lr3-quality.webp 1672w, https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/09\/igf1-lr3-quality-300x169.webp 300w, https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/09\/igf1-lr3-quality-1024x576.webp 1024w, https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/09\/igf1-lr3-quality-768x432.webp 768w, https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/09\/igf1-lr3-quality-1536x864.webp 1536w\" sizes=\"auto, (max-width: 1672px) 100vw, 1672px\" \/><figcaption class=\"wp-element-caption\">Illustration \u00e9ditoriale g\u00e9n\u00e9r\u00e9e par AI illustrant un flux de travail analytique. Il ne repr\u00e9sente pas un produit fourni, un lot lib\u00e9r\u00e9, une formulation approuv\u00e9e ou un r\u00e9sultat d'analyse.<\/figcaption><\/figure><h2 class=\"wp-block-heading\">Fiche d'identit\u00e9<\/h2><p class=\"wp-block-paragraph\">Le nom \u00ab LR3 \u00bb code deux changements structurels. Un mat\u00e9riau d\u00e9pourvu de l'extension ou portant Glu natif en position 3 n'est pas le m\u00eame analogue, m\u00eame si un anticorps r\u00e9agit de mani\u00e8re crois\u00e9e avec les deux.<\/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>Longueur<\/strong><span>Acides amin\u00e9s 83<\/span><\/div><div class=\"pim-evidence-row\"><strong>Caract\u00e9ristiques de conception<\/strong><span>Substitution Arg3 plus extension N-terminale des r\u00e9sidus 13<\/span><\/div><div class=\"pim-evidence-row\"><strong>Formule et masse du catalogue<\/strong><span>C400H625N111O115S9\u00a0; environ 9117.5 g\/mol<\/span><\/div><div class=\"pim-evidence-row\"><strong>Pas \u00e9quivalent \u00e0<\/strong><span>R\u00e9sidu natif 70 IGF-1<\/span><\/div><div class=\"pim-evidence-row\"><strong>Noyau QC<\/strong><span>Identit\u00e9, preuve de disulfure\/pliement, puret\u00e9, agr\u00e9gation, contenu, bioactivit\u00e9 et liaison entre lots<\/span><\/div><\/div><\/div><h2 class=\"wp-block-heading\">Limite analytique et de preuve<\/h2><p class=\"wp-block-paragraph\">L'expression recombinante peut produire des esp\u00e8ces mal repli\u00e9es, coup\u00e9es ou agr\u00e9g\u00e9es. La cartographie des masses intactes et des peptides prend en charge la structure primaire, tandis que la chromatographie d'exclusion de taille et un test cellulaire qualifi\u00e9 abordent diff\u00e9rents attributs de qualit\u00e9.<\/p><p class=\"wp-block-paragraph\">La r\u00e9sistance aux prot\u00e9ines de liaison est une justification de conception, et non une affirmation g\u00e9n\u00e9rale sur la puissance de chaque mod\u00e8le. Indiquez le syst\u00e8me de test, le comparateur et la concentration chaque fois que vous d\u00e9crivez une activit\u00e9 relative.<\/p><h2 class=\"wp-block-heading\">R\u00e8gle \u00e9ditoriale<\/h2><p class=\"wp-block-paragraph\">Indiquez le mat\u00e9riau exact, la forme, le mod\u00e8le ou la population et le point final pris en charge par l'enregistrement cit\u00e9. Ne convertissez pas la plausibilit\u00e9 m\u00e9caniste, un r\u00e9sultat animal, une \u00e9tiquette officielle d'un m\u00e9dicament fini ou un test analytique en une all\u00e9gation concernant un lot du catalogue sans rapport.<\/p>","protected":false},"excerpt":{"rendered":"<p>Long R3 IGF-1 est un analogue de l'acide amin\u00e9 83 IGF-1 avec une substitution Arg en position 3 et une extension N-terminale du r\u00e9sidu 13. Il n\u2019est pas interchangeable avec le r\u00e9sidu 70 natif IGF-1.<\/p>","protected":false},"author":1,"featured_media":774,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"pim_family_ids":"340","pim_article_type":"Evidence and material-quality guide","pim_evidence_level":"Primary recombinant-expression and comparative animal literature","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\":\"Recombinant IGF-1 and LR3 IGF-1 expression in Pichia\",\"url\":\"https:\/\/pubmed.ncbi.nlm.nih.gov\/37261455\/\",\"note\":\"Primary 2023 expression and bioactivity study; PMID 37261455.\"},{\"title\":\"IGF-1 and LongR3 IGF-1 in bovine oocyte maturation\",\"url\":\"https:\/\/pubmed.ncbi.nlm.nih.gov\/33038561\/\",\"note\":\"Comparative 739-COC study with null meiotic\/apoptosis results; PMID 33038561.\"},{\"title\":\"Long R3 IGF-1 and protein metabolism in beef heifers\",\"url\":\"https:\/\/pubmed.ncbi.nlm.nih.gov\/10370861\/\",\"note\":\"Primary 1999 cattle metabolism study; PMID 10370861.\"}]","footnotes":""},"categories":[20],"tags":[],"class_list":["post-790","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>IGF-1 LR3 Identity Guide: Arg3, N-Terminal Extension and Protein QC<\/title>\n<meta name=\"description\" content=\"Long R3 IGF-1 is an 83-amino-acid IGF-1 analogue with an Arg substitution at position 3 and a 13-residue N-terminal extension. 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