Recombinant human IGF 1 LR3 protein (Qk041) 100 Recombinant Human LR3 IGF 1 (Media Grade) Recombinant Protein APExBIO IGF 1 LR3 Dosage Calculator and Chart A Z Guide IGF 1 LR3 Superior Peptide Same molecule. Longer leash. IGF 1 LR3 is a long arginine 3 analog of insulin like growth factor 1. The Arg3 substitution prevents binding to IGFBP 3, the carrier protein that normally clears IGF 1 from circulation. Half life
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