our results indicate that in interferon-treated cells , there is approximately a 2000 fold decrease in the production of infectious mulv , but only a 10-20 fold decrease in the level of viral specific extracellular reverse transcriptase activity , and only about a 2 fold difference in the number of virus particles observed on the cell membrane as determined by scanning electron microscopic ( sem ) studies .
C0007634
cells
C0007603
cell membrane