Receptor Grade IGF-1 LR3 – High-Purity Analog for Advanced Research
Receptor Grade IGF-1 LR3 (Long R3) is the premier choice for researchers requiring maximum biological potency. By modifying the original recombinant IGF-1 sequence, scientists created a version that avoids inactivation by IGF-binding proteins (IGFBPs). This ensures that the peptide remains “free” and active in the research environment for a much longer duration than endogenous IGF-1.
Key Research Areas:
- Superior Biological Activity: The “Long R3” modification involves an extension of the N-terminus and a substitution of Glutamic Acid for Arginine at the third position. This structural change results in a lower affinity for inhibitory binding proteins, allowing the peptide to interact more freely with the Type 1 IGF receptor.
- Enhanced Intracellular Signaling: Research suggests that IGF-1 LR3 is highly effective at inducing the Type 1 IGF receptor. This activation triggers a cascade of intracellular signals that promote cellular proliferation and inhibit apoptosis (programmed cell death).
- Mammalian Cell Productivity: In studies involving recombinant CHO (Chinese Hamster Ovary) cell lines, IGF-1 LR3 demonstrated equivalent or superior performance compared to standard insulin. Even at low concentrations, it supports significantly higher productivity and cell survival.
- Receptor Grade vs. Media Grade: This Receptor Grade variant is characterized by a higher purity level than standard Media Grade. It is the gold standard for in-vivo animal studies and high-precision cell assays where biological potency and consistency are critical to the data.
- Metabolic & Anabolic Research: Researchers use IGF-1 LR3 to investigate muscle tissue development, bone mineralization, and the general anabolic pathways mediated by the growth hormone axis.
Elite Peptide Supply provides ultra-pure Receptor Grade IGF-1 LR3. Our peptide is synthesized to ensure the full 83-amino acid sequence is intact, providing the high stability and extended half-life necessary for complex longitudinal research.
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