FIG. 2.

Flow-cytometric analysis of cells isolated from the diploid-tetraploid competition and from single-tetraploid infection. The panels show the DNA content of cells from colonies isolated from mouse kidneys. The fluorescence peak for G₁ diploid cells is at 160 units and for G₂ cells is at 320 units. For tetraploids the corresponding peaks are at 350 and 620 units (black arrows). A to F. Colonies from the competition experiment. A. AF27 preinoculation (MC3). B. 4450 preinoculation (MC4). C. 2-dG-sensitive cells (6 days, MC26). D. 2-dG-resistant cells (8 days, MC28). E. 2-dG-sensitive cells (8 days, MC29). F. 2-dG-sensitive cells (8 days, MC12). The preinoculum 4450 trace is superimposed on panels A and C to F. The MC numbers refer to strains in Table 4. G to I. Colonies from a single infection with tetraploid 3834.