IGFBP-5 is only one of a family of six IGFBPs. IGFBP-5 is a 29 kDa phosphorylated and glycosylated protein, which is secreted by a wide variety of cell types during different growth conditions. IGFBP-5, the most conserved IGFBP, is the major protein secreted by skeletal muscles. IGFBP-5 Protein, Canine (HEK293, Fc) is the recombinant canine-derived IGFBP-5 protein, expressed by HEK293 , with C-hFc labeled tag.