PDX1 and infection: The ratios of nGFP-positive cells at 24 hours after infection with the indicated vector at an optimal multiplicity of infection (MOI) were as follows: 94.1% ± 4.5% for pAd-Pdx1; 88.8% ± 7.6% for pAd-Ngn3; 88.6% ± 3.1% for pAd-NeuroD1; and 87.7% ± 4.2% for pAd-MafA.