TNFRSF1A (TNF RI) protein has a high ability to bind with tumor necrosis factor-alpha (TNF-α) . TNFRSF1A is a STAT3 target gene that regulates the NF-κB pathway. TNFRSF1A activate NF-κB, mediate apoptosis, and function as a regulator of inflammation. TNFRSF1A Protein, Rat (HEK293, His) is expressed by HEK293 and has a transmembrane region (M1-A211) with a His tag at the C-terminus[1].