ANTXR1 and anthrax infection: A few months later, after 2001 anthrax attack, tumor endothelial marker 8 (TEM8) was reported as an anthrax toxin receptor [3], hence being named anthrax toxin receptor 1 (ANTXR1), which was followed by the identification of CMG2 as the second anthrax toxin receptor (ANTXR2) [4].