I am using lentiviruses to transfer my gene into the mES cells and the zeocine resistance gene is present outside of the 5'LTR and 3'LTR region of the transfer plasmid. so to select stably transgene intergrated cell can I use Zeocine antibiotic. Will the plasmid transfer plasmid remains inside the after insertion of gene of insert within LTR into the mES cells genome.