infected amphotropic packaging line cells were sorted for GFP expression in a Becton–Dickinson Facstar cell sorter using the fluorescein channel for excitation and emission. The resulting cells were grown up to larger numbers and medium
infected amphotropicpackaging line cells were sorted for GFP expression in aBecton–Dickinson Facstar cell sorter using the fluorescein channelfor excitation and emission. The resulting cells were grown up tolarger numbers and medium