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The K7M2-pCI Neo cell line was derived from the K7M2 wt (ATCC CRL-2836) cell line. K7M2 wt cells were transfected with the pCI Neo vector. The vector carries the human cytomegalovirus (CMV) immediate-early enhancer/promoter region to promote constitutive expression of cloned DNA inserts in mammalian cells. It also contains SV40 viral sequences and the neomycin resistance gene.