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IGF-1 LR3, Insulin-like Growth Factor-1 Long Arginine 3, is a recombinant analogue of human IGF-1, structurally modified to enhance stability in laboratory models. It differs from native IGF-1 by substitution of an arginine for glutamic acid at position 3 and the addition of 13 amino acids to the N-terminus. These changes reduce binding to IGF-binding proteins, extending its half-life and enabling prolonged biological activity. IGF-1 LR3 is examined in experimental systems for growth-factor receptor signaling and cellular pathway modulation.
Sequence: MFPAMPLSSL FVNGPRTLCG AELVDALQFV CGDRGFYFNK PTGYGSSSRR APQTGIVDEC CFRSCDLRRL EMYCAPLKPA KSA
Molecular Formula: C₄₀₀H₆₂₅N₁₁₁O₁₁₅S₉
Molecular Weight: ≈ 9117.5 Da
CAS Number: 946870-92-4
This engineered peptide shares tertiary similarity to endogenous IGF-1 but exhibits markedly reduced affinity for serum IGF-binding proteins, resulting in a plasma persistence approximately 120 times longer than native IGF-1.
Cellular Pathway Studies: Examined for associations with mitogenesis and differentiation in vitro.
Metabolic Pathway Analysis: Studied for glucose and lipid signaling in controlled models.
Myostatin Modulation: Examined for modulation of myostatin signaling in preclinical models.
Tissue Repair and Longevity Research: Studied for associations with tissue maintenance and senescence pathways in laboratory systems.
Glucocorticoid Interaction: Examined for signaling interactions with glucocorticoid pathways in experimental models.
IGF-1 LR3 is supplied strictly for laboratory and research purposes only. It is not approved for human or veterinary use. All biological effects described above are derived from preclinical or in-vitro data and should not be interpreted as clinical outcomes.
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