Insulin-like growth factor 1 (IGF-1) that was once called somatomedin C, is a polypeptide protein hormone similar in molecular structure to insulin. It plays an important role in childhood growth and continues to have anabolic effects in adults.IGF-1 consists of 70 amino acids in a single chain with three intramolecular disulfide bridges. IGF-1 has a molecular weight of 7649 daltons.
This product (L-R3- IGF-I) is different from the traditional IGF-I, Structurally it has two significant modifications — first, one amino acid in the IGF-I structure, the glutamic acid (E) at position 3 has been replaced with an arginine (R), and second, because the molecule is made as a fusion protein, it has an N-terminal fusion partner which is 13 amino acids long. These account for the name long replaced3- IGF-1(L-R3- IGF-I).
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