IGF-1 LR3

IGF-1 LR3 (Long R3 Insulin-Like Growth Factor-1) is a modified analog of naturally occurring IGF-1 designed to exhibit altered binding characteristics and prolonged biological activity in experimental systems. The peptide differs from native IGF-1 through an arginine substitution at position three and the addition of a 13-amino-acid extension at the N-terminus. These structural modifications reduce its affinity for several IGF-binding proteins while preserving interaction with the IGF-1 receptor, making IGF-1 LR3 particularly useful for studying IGF-mediated signaling under controlled laboratory conditions. IGF-1 signaling is involved in numerous biological processes, including cellular proliferation, differentiation, protein synthesis, glucose metabolism, and tissue development. Because IGF-1 LR3 demonstrates enhanced potency and a longer duration of activity relative to native IGF-1 in many experimental models, researchers use it to investigate how sustained IGF-1 receptor activation affects these pathways. Its distinct characteristics have made IGF-1 LR3 a widely studied research compound for examining growth-factor signaling, cellular development, metabolic regulation, and the molecular pathways connecting growth hormone and IGF activity.

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