I am trying to develop stable cell lines for my desired protein in HEK293 cells through G418 selection. However, HEK293 cells are not getting killed by G418 even at high conc (1000ug/ul). Thus, I would like to look for whether my cells already possess a neomycin resistance gene (neo phosphotransferase) or not? So please help me by providing the sequence or primers for neomycin resistance gene? 

Thanks

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