IGF-1 LR3

Long R3 IGF-I | Recombinant IGF-I Analog | Laboratory Research Reference

FOR LABORATORY RESEARCH USE ONLY.
Not intended for use in humans or animals. No consumer, wellness, physique, or sport-related application is represented.

Product Overview

IGF-1 LR3, also known as Long R3 IGF-I, is a modified analog of human insulin-like growth factor I. It is commonly described as an 83-amino-acid IGF-I analog containing a 13-amino-acid N-terminal extension and an arginine substitution at position 3. These structural changes are discussed in cell-culture literature because they reduce interaction with IGF-binding proteins compared with native IGF-I.

In research-catalogue context, IGF-1 LR3 is best positioned as a cell-culture and receptor-signaling reference material. Repligen describes Long R3 IGF-I as a recombinant analog used in mammalian cell-culture systems, including CHO, HEK293, Vero, MDCK, and fibroblast-related workflows.

Catalogue Description

IGF-1 LR3 is a Long R3 IGF-I research material used as a reference analog in cell-culture and molecular-signaling studies. It is structurally related to human IGF-I and includes modifications that are commonly discussed in relation to IGF-binding protein interaction and IGF-I receptor research.

Compliance Note

IGF-1-related substances are high-sensitivity compounds in sport and regulatory contexts. WADA’s 2026 list includes insulin-like growth factor-1 under peptide hormones, growth factors, related substances, and mimetics. Therefore, this page should stay strictly research-focused and must not include sport, physique, wellness, or personal-use language.

DISCLAIMER:

• Products sold on our website are meant for scientific research purposes only, designed for in vitro testing and lab experimentation exclusively. These products are not intended to be used as foods, drugs or cosmetics, any sort of bodily introduction of the products into humans or animals is strictly prohibited.
• All the products you see on the website are being sold as a freeze dried powder, in a sealed sterile vial; and should be reconstituted.
  The product’s label clearly states the amount of product a vial contains; some products are offered in different variations.
• The products we are selling come in a sealed vial but require additional lab equipment for proper testing.
• Though we make sure packaging, label, seals and writing does not differ from the product photos you see on our website, there is a chance for a minimal deviation.