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Persistence of d109 in neuron cultures. Cultures of embryonic TG were infected with d109 and photographed over time. Shown are duplicate exposures of d109 infection depicting either phase-contrast results and GFP expression or GFP expression alone. d109 is shown at day 1 postinfection (A and B), at day 7 postinfection (C and D), and at day 38 postinfection (E and F).
