Etanercept is a recombinant-DNA drug made by combining two proteins . It links human soluble TNF receptor to the Fc component of human immunoglobulin G1 . It is a large molecule, with a molecular weight of 150 kDa., that binds to TNF and decreases its role in disorders involving excess inflammation in humans and other animals, including autoimmune diseases such as ankylosing spondylitis, juvenile rheumatoid arthritis, psoriasis, psoriatic arthritis, rheumatoid...