Rabbit β-globin mRNA production in mouse L cells transformed with cloned rabbit β-globin chromosomal DNA

Abstract
Mouse thymidine kinase-negative L cells were transformed with a cloned rabbit chromosomal β-globin gene linked to the cloned thymidine kinase gene of herpes simplex virus type 1. Most thymidine kinase-positive cell lines contained one or more copies of rabbit β-globin DNA and produced up to 2,000 copies of rabbit β-globin RNA per cell indistinguishable from its authentic counterpart. No mouse β-globin mRNA was detected.
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