... The invention relates to nanotechnology, biotechnology, genetic engineering and medicine and makes it possible to produce nucleoprotein nanostructures which exhibit various properties useful for health care purposes. The invention offers a new method for producing nucleoprotein nanoparticles , which involves (a) providing an expression vector for directing nucleic acid synthesis in a plant cell; (b) providing at least Nanoparticles produced according to this method are also disclosed. ...