Recombinant Human Insulin-Like Growth Factor-Binding Protein 4/IGFBP-4 is produced by our mammalian expression system in human cells. The superfamily of insulin-like growth factor (IGF). The biological effects of IGF-BP4 can be regulated by Pregnancy Associated Plasma Protein A (PAPP-A), which reduces IGF-BP4/IGF binding affinity by proteolytically cleaving IGF-BP4. Purity > 90% immunoaffinity purified