IGF-1 I.R3

IGF-1 I.R3 abbreviated as IGF-1 LR3 is a synthetic protein and lengthened analog of human insulin-like growth factor 1 (IGF-1 I.R3). It differs from native IGF-1 I.R3 in that it possesses an arginine instead of a glutamic acid at the third position in its amino acid sequence (“arginine 3”), and also has an additional 13 amino acids at its N-terminus (MFPAMPLLSLFVN) (“long”), for a total of 83 amino acids (relative to the 70 of IGF-1)The amino acid sequence of IGF-1 LR3 is MFPAMPLSSL FVNGPRTLCG AELVDALQFV CGDRGFYFNK PTGYGSSSRR APQTGIVDEC CFRSCDLRRL EMYCAPLKPA KSA.