Smithsonian Report, 1959—Lilly Research Laboratories PLATE 4 
a 
1. Normal liver. There is a flame-red 2. Normal salivary gland. Here the cyto- 
fluorescence of cytoplasmic RNA. The plasmic RNA is situated at the base of 
nuclei, containing DNA, have a greenish- the epithelial cells. Five tissue mast 
yellow color. (XX 225.) cells showing mahogany-red fluorescent 
granules are present. (X 225.) 
3. Calf-kidney tissue culture infected 18 4. Hela cells infected 2 days previously 
hours previously with influenza A (W.S. with adenovirus, type 5. ‘This is a late 
strain). Many of the nuclei show stage of infection, and intensely fluores- 
diffuse RNA fluorescence of varying cing condensed masses of DNA-contain- 
intensity. The pattern of cytoplasmic ing material occupy the center of some 
RNA fluorescence is altered in many of nuclei. An apparently normal nucleus 
the cells. (XX 225.) is in the center of the field. (X 325.) 
