Figure S2. Bright-field microscopy of MP-12–infected mammalian embryonic stem cells, over the course of the forward genetic screen.

WT and retro-library AN3-12 cells were monitored every day over 17 d. Cells were trypsinized and reinfected at day 6 and day 13. A representative image is shown for each time point/condition. Scale bar (top left image): 0.5 mm.