Abstract
In the nuclei of HeLa cells infected with Herpes simplex virus which before infection had H3-thymidine incorporated in their DNA, marking was found in the periphery, in the so-called border chromatin. H3 -thymidine added after infection was taken up only in the inner part of the nucleus. The border chromatin remained free. This indicates that the DNA-metabolism characteristic for the cell was interrupted and now a DNA-metabolism for the reproduction of the virus occurs only in the inner part of the nucleus.