IGF-1 LR3

 Premium IGF-1 LR3 Peptide for Sale – Direct from Shanghai Manufacturer

IGF-1 LR3 (Insulin-like Growth Factor-1 Long Arg3) represents a significant advancement in growth factor research. As a synthetic analog of human IGF-1, this modified peptide offers researchers a powerful tool for investigating cell proliferation, differentiation, and growth mechanisms with enhanced potency and prolonged activity . If you are searching for “IGF-1 LR3 peptide for sale” for your laboratory investigations, you need a manufacturing partner who understands the complexity of this 83-amino acid growth factor and can deliver the purity your studies demand. That partner is Apeptide (Shanghai) Co., Ltd.

We are a legitimate, licensed manufacturer operating from our headquarters at No. B Room 326, Jinhai Road 2588, Pudong District, Shanghai, China. Our facility is dedicated to the research, development, and production of high-purity peptide raw materials, catalog peptides, fluorescent dyes, and amino acids. When you purchase IGF-1 LR3 peptide for sale from shanghaiapeptides.com, you are buying directly from the source—not a middleman or reseller.

Understanding IGF-1 LR3: The Enhanced Growth Factor

IGF-1 LR3 is a synthetic analog of human insulin-like growth factor-1 (IGF-1) with two key modifications that dramatically enhance its biological activity and research utility .

Key Structural Modifications

• Arginine Substitution at Position 3: Replacement of glutamic acid (Glu) with arginine (Arg) at position 3 (Glu³→Arg³)

• N-Terminal Extension: Addition of a 13-amino acid methionine-containing peptide leader (MFPAMPLSSL FVN) at the N-terminus

Enhanced Properties

• Reduced Binding to IGF-Binding Proteins (IGFBPs): 3-5 fold lower affinity for IGFBPs compared to native IGF-1

• Extended Half-Life: 10-20 fold longer half-life due to reduced protein binding

• Increased Potency: Significantly more potent in cell culture and in vivo models

• Enhanced Bioavailability: Greater free IGF-1 availability for receptor activation

Key Characteristics

• Sequence: MFPAMPLSSL FVNGPLGPLR PLLALLPAYQ PAPTGAEGTL CVDEVFVICD ERGFYFSKPT GYGSGSSRRS APQTGIVDEC CFRSCDLRRL EMYCAPLKPA KSA

• Molecular Formula: C₁₅₂₉H₂₅₄₃N₄₆₇O₄₅₀S₁₀

• Molecular Weight: Approximately 35,000 Da (35 kDa)

• CAS Number: 122684-77-9

• Form: Lyophilized powder

• Purity: ≥99% (verified by HPLC and Mass Spectrometry)

• Storage: -20°C to -80°C, protected from light and moisture

Mechanism of Action

IGF-1 LR3 exerts its effects through the Type 1 IGF receptor (IGF-1R), a tyrosine kinase receptor:

Why IGF-1 LR3 Matters in Research

IGF-1 LR3 has become an indispensable research tool in cell biology, developmental biology, and regenerative medicine. Its enhanced properties make it particularly valuable for studies requiring sustained growth factor signaling without the confounding effects of IGFBP sequestration.

Key Research Applications

Scientists seek IGF-1 LR3 peptide for sale for various laboratory investigations:

Advantages Over Native IGF-1

• 10-20x longer half-life for sustained signaling studies

• 3-5x reduced IGFBP binding for consistent free IGF-1 levels

• Superior potency in cell culture (EC₅₀ in picomolar range)

• More predictable dose-response due to reduced protein interactions

The Critical Importance of Quality for IGF-1 LR3 Research

When you purchase IGF-1 LR3 peptide for sale, quality parameters are non-negotiable. This complex 83-amino acid protein requires precise synthesis, correct folding, and proper disulfide bridge formation to ensure biological activity.

The Apeptide Quality Standard

• 99% Purity Guarantee: Verified by High-Performance Liquid Chromatography (HPLC)

• Mass Spectrometry: Molecular weight confirmation (35,000 Da expected)

• Amino Acid Analysis: Sequence verification of all 83 amino acids

• Peptide Content Determination: Accurate net peptide weight

• Disulfide Bridge Confirmation: Ensuring correct cysteine connectivity

• Bioactivity Testing: Cell-based potency assays (available upon request)

• Endotoxin Testing: <0.05 EU/mg available for cell culture applications

• Batch-Specific COAs: Full traceability with Certificates of Analysis

• Stability Testing: Ensuring integrity from our lab to yours

Why Purity Matters for IGF-1 LR3 Research

• Cell Proliferation Assays: EC₅₀ values in picomolar range require precise dosing

• Receptor Binding Studies: Impurities can compete for IGF-1R binding

• Signal Transduction: Pathway analysis demands documented purity

• Stem Cell Culture: Impurities may affect differentiation outcomes

• In Vivo Studies: Dosing consistency critical for regenerative research

The Manufacturer Advantage: Why Source IGF-1 LR3 from Apeptide

When you search for “IGF-1 LR3 peptide for sale,” you encounter many options. Here is why direct sourcing from our Shanghai facility is the superior choice.

Complete Transparency

• Physical Location: We operate from No. B Room 326, Jinhai Road 2588, Pudong District, Shanghai. You can verify our credentials.

• Manufacturing Expertise: Decades of combined experience in peptide and protein synthesis.

• No Middlemen: You pay manufacturer-direct pricing, not reseller markups.

Technical Expertise

Our team understands the specific requirements for IGF-1 LR3 research:

• Proper handling to maintain protein stability and folding

• Appropriate reconstitution for various assay systems

• Storage conditions to prevent aggregation and degradation

• Documentation requirements for research compliance

• Understanding of IGF-1 signaling pathways

Quality You Can Trust

• Rigorous Testing: Every batch undergoes HPLC and MS analysis

• Documentation: Full COAs provided for complete traceability

• Consistency: Reliable quality batch after batch

Seamless Supply to the USA Market

Sourcing IGF-1 LR3 peptide for sale from China should be straightforward. We have optimized our logistics specifically for American researchers and wholesale partners.

• Fast Shipping: 5-7 business days to US addresses

• Cold-Chain Packaging: Temperature-controlled transit at -20°C to -80°C for sensitive proteins

• Desiccant Protection: Double-sealed packaging to prevent moisture absorption

• Wholesale Programs: Dedicated support for small and large supply companies

• Customs Expertise: Smooth clearance with complete documentation

• Discreet Packaging: Professional, temperature-controlled containers

• Tracking Integration: Real-time visibility from Shanghai to your lab

Research Applications: Where IGF-1 LR3 Excels

Understanding the diverse applications of IGF-1 LR3 helps researchers appreciate why quality matters.

Cell Biology Research

• Cell proliferation and differentiation assays

• Apoptosis and cell survival studies

• Signal transduction pathway analysis

• Cell cycle regulation investigations

Stem Cell Research

• Mesenchymal stem cell expansion

• Neural stem cell culture

• Pluripotency maintenance studies

• Directed differentiation protocols

Muscle Biology

• Myoblast proliferation and differentiation

• Skeletal muscle hypertrophy models

• Muscle regeneration studies

• Sarcopenia research

Neuroscience Research

• Neuronal survival and neurite outgrowth

• Spinal cord injury models

• Neuroprotection studies

• Axonal regeneration investigations

Developmental Biology

• Embryonic growth and development

• Organogenesis studies

• Growth factor signaling in development

• Teratology research

Wound Healing Research

• Cutaneous wound closure models

• Diabetic wound healing

• Tissue regeneration studies

• Angiogenesis investigations

Metabolic Research

• Glucose metabolism studies

• Insulin sensitivity investigations

• Adipose tissue biology

• Diabetes research models

Frequently Asked Questions

: What exactly is IGF-1 LR3 peptide for sale at Apeptide?
A: IGF-1 LR3 (Insulin-like Growth Factor-1 Long Arg3) is a synthetic analog of human IGF-1 with two key modifications: an arginine substitution at position 3 and a 13-amino acid N-terminal extension. These modifications reduce binding to IGF-binding proteins (IGFBPs) by 3-5 fold and extend half-life by 10-20 fold . It is supplied strictly for laboratory investigation and in vitro research only, not for human consumption.

: What purity levels do you guarantee for IGF-1 LR3?
A: We guarantee 99% purity, verified by HPLC testing with Certificates of Analysis available for every batch. Each COA provides detailed purity analysis, mass spectrometry confirmation (35,000 Da expected), and batch-specific data.

: What is the CAS number for IGF-1 LR3?
A: The CAS number for IGF-1 LR3 is 122684-77-9 .

: What is the molecular weight of IGF-1 LR3?
A: The molecular weight is approximately 35,000 Da (35 kDa) .

: How does IGF-1 LR3 differ from native human IGF-1?
A: IGF-1 LR3 has two key modifications: an arginine substitution at position 3 (replacing glutamic acid) and a 13-amino acid N-terminal extension. These modifications reduce binding to IGF-binding proteins by 3-5 fold and extend the half-life by 10-20 fold, resulting in significantly enhanced potency and prolonged activity .

: What are the advantages of using IGF-1 LR3 over native IGF-1 in research?
A: IGF-1 LR3 offers several advantages: 3-5 fold reduced IGFBP binding for consistent free IGF-1 levels, 10-20 fold extended half-life for sustained signaling, significantly enhanced potency in cell culture, and more predictable dose-response curves due to reduced protein interactions.

: Is your IGF-1 LR3 for human consumption?
A: Absolutely not. Our IGF-1 LR3 is strictly for research and laboratory use only. It is not for human consumption, clinical application, or any use involving humans or animals. All products are labeled “FOR RESEARCH USE ONLY.”

: How should I store IGF-1 LR3 upon receipt?
A: IGF-1 LR3 should be stored at -20°C to -80°C (freezer) immediately upon receipt, protected from light and moisture. For long-term storage, -80°C is recommended. Avoid repeated freeze-thaw cycles. Reconstitute only immediately before use.

: What solvent should I use for reconstitution?
A: For most research applications, sterile water, PBS (pH 7.4), or cell culture medium is appropriate. IGF-1 LR3 is soluble in aqueous buffers. For cell culture applications, sterile PBS or culture medium with 0.1% BSA is recommended. Contact our technical team for application-specific recommendations.

: What is the half-life of IGF-1 LR3 compared to native IGF-1?
A: IGF-1 LR3 has an extended half-life of approximately 10-20 times longer than native IGF-1 due to its reduced binding to IGF-binding proteins .

: Do you ship to all 50 US states?
A: Yes. We ship to research institutions, laboratories, and wholesale partners throughout the United States.

: Can you accommodate bulk orders for wholesale distribution?
A: Absolutely. We offer competitive wholesale pricing for qualified partners. Contact our team through shanghaiapeptides.com with your volume requirements.

: What documentation do you provide for research compliance?
A: Every order includes batch-specific Certificates of Analysis (COAs) with HPLC and MS data. We also provide commercial invoices, packing lists, and customs documentation as needed.

Quality Control: The Apeptide Standard

Your research deserves nothing less than the highest purity materials. Our quality control protocols exceed industry standards.

Analytical Methods

• HPLC Analysis: Every batch tested for purity (typically 99%+)

• Mass Spectrometry: ESI-MS or MALDI-TOF for molecular weight confirmation (35,000 Da expected)

• Amino Acid Analysis: Sequence verification of all 83 amino acids

• Disulfide Bridge Confirmation: Ensuring correct cysteine connectivity

• Peptide Content Determination: Accurate net peptide weight

• Endotoxin Testing: <0.05 EU/mg available for cell culture applications

• Bioactivity Testing: Cell-based potency assays available upon request

• Stability Studies: Ensuring integrity under various conditions

Batch Documentation

Each shipment includes:

• Certificate of Analysis with actual test results

• HPLC chromatogram (available upon request)

• Mass spectrometry data

• Batch number for traceability

• Expiration date and storage recommendations

• Reconstitution guidelines

Beyond IGF-1 LR3: A Complete Research Partner

Apeptide (Shanghai) Co., Ltd. is more than just a supplier of IGF-1 LR3 peptide for sale. We are a full-service biochemical manufacturer committed to advancing research worldwide.

Our Capabilities

• Custom Synthesis: Develop proprietary peptides and proteins for your specific research needs

• Catalog Peptides: Hundreds of sequences available for immediate shipment

• Growth Factor Library: Including IGF-1, IGF-1 LR3, EGF, FGF, and related growth factors

• Fluorescent Dyes: High-purity labeling agents for imaging and detection

• Amino Acids: Building blocks for synthesis and research

Quality Certifications and Compliance

• Licensed manufacturer with physical facility in Pudong District, Shanghai

• Rigorous quality control protocols

• Transparent documentation and traceability

• Experienced technical support team

• Strict adherence to research-use-only compliance

The Science Behind IGF-1 LR3

The insulin-like growth factor (IGF) system is fundamental to cell growth, differentiation, and survival. Native IGF-1 is a 70-amino acid protein that shares structural homology with proinsulin and signals through the Type 1 IGF receptor (IGF-1R), activating downstream pathways including PI3K/Akt and MAPK/ERK .

However, native IGF-1’s activity is tightly regulated by a family of six IGF-binding proteins (IGFBP-1 through IGFBP-6) that bind IGF-1 with high affinity, sequestering it from receptor binding and prolonging its half-life . This regulation is essential in vivo but can complicate in vitro studies.

IGF-1 LR3 was specifically engineered to overcome this limitation. By substituting glutamic acid with arginine at position 3 and adding a 13-amino acid N-terminal extension, the peptide’s affinity for IGFBPs is reduced by 3-5 fold, resulting in significantly higher free IGF-1 concentrations in culture and in vivo . The result is a research tool with enhanced potency, extended half-life, and more predictable biological activity.

The search for premium “IGF-1 LR3 peptide for sale” ends at Apeptide (Shanghai) Co., Ltd. As a dedicated manufacturer of peptides and biochemicals, we combine scientific expertise with manufacturing integrity to deliver the purest research materials available. Whether you need IGF-1 LR3 for cell biology research, stem cell culture, muscle regeneration studies, or specialized growth factor investigations, we are your trusted manufacturing partner.