IGF-II protein.Insulin-like growth factors-I and-II (IGF-I and IGF-II) aresmall peptides, which are able to promote cell proliferation, differentiation and survival resulting predominantlyfrom interactions with the type 1 IGF receptor.The availability of IGF to bind to IGF receptors is influenced by Insulin-like Growth Factor Binding Proteins (IGFBPs).IGF-II is mainly produced by liver cells and is crucialin normal fetal growth.Compared with IGF-I, IGF-II is more well-known as a tumorgenesis marker.Recombinant human IGF-II produced in E. coli is a single,non-glycosylated, polypeptide chain containing 67 aminoacids and having a molecular mass of 7.505 kDa.Recombinant IGF-II is purified by proprietary chromatographic techniques. MW: 8 kDa. Purity > 95% pure by SDS-PAGE and RP-HPLC