IGF-1 LR3 (Long Arginine 3 IGF-1) is a synthetic, modified recombinant analog of human insulin-like growth factor 1. Featuring an 83-amino acid sequence with a substitution and an N-terminal extension, this structural modification reduces binding to IGF-binding proteins (IGFBPs), prolonging its half-life for controlled laboratory study of cellular proliferation, protein synthesis, and tissue signaling pathways.
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