Among potential targets are viral entry factors, including scavenger receptor type B1 (SR-B1) and CD81, as well as neutralizing antibodies against the viral glycoproteins. Popular targets related to translation and replication are the NS3/4A protease (inhibited by telaprevir and boceprevir) and the NS5B polymerase, as well as the NS2/3 autoprotease, the NS3 helicase, and nonenzymatic targets such as NS4B and NS5A proteins.