Rabbit anti-Ricinus communis Ricin toxin A chain (native) polyclonal antibody for EM, ELISA, WB. Ricin chain A (RTA) is a ribosome inactivating enzyme with a molecular weight of 32 kDa. RTA is normally linked by a disulfide bond to the galactose/N acetylgalactosamine binding lectin (34 kDa), also called the B chain or RTB. Together with RTB, RTA cons