Monoclonal antibodies 1RK2 to A-chain of ricin (IgG1). The characteristic Y-shaped domain structure of the antibodies is clearly resolved. Image obtained in semicontact mode in air.

Sample courtesy of A.G. Tonevitskiy and M. M. Moisenovich, Institute for transplantation and artificial organs, Moscow.
Image courtesy of M.Savvateev, NT-MDT, Moscow, Russia mihail.savvateev@mail.ru.