Lysis of cell nuclei on perforated electron microscopic supports

The technique of gentle nuclear lysis for electron microscopic observation is suggested, which comprises adsorption of isolated nuclei on a positively charged pricked supporting film and sequential short-timed installation of the support with its back onto the filter paper moistened by lysing solution. The advantage of the method is slow, gradient-like, and to some extent regulated treatment allowing to visualize nuclear structures in their integrity. (orig.)