Serpin F1 protein is part of the secreted Frizzled-related protein (sFRP) family and regulates the Wnt signaling pathway. As a member, Serpin F1 may interact with Wnt ligands and Frizzled receptors to regulate key cellular processes. Serpin F1 Protein, Rat (HEK293, His) is the recombinant rat-derived Serpin F1 protein, expressed by HEK293 , with C-His labeled tag.