The FNDC4 protein is an anti-inflammatory factor in the intestine and colon that regulates macrophages by downregulating pro-inflammatory gene expression and affecting phagocytosis. It does this by modulating key pathways associated with macrophage activation, in part through STAT3 activation and signaling. FNDC4 Protein, Human (HEK293, Fc) is the recombinant human-derived FNDC4 protein, expressed by HEK293 , with C-mFc labeled tag.