Altered nucleic acid metabolism in human cell cultures infected with mycoplasma. Levine, Elliot M. ; Thomas, Lewis ; McGregor, Dorothy ; Hayflick, Leonard ; Eagle, Harry Abstract Publication: Proceedings of the National Academy of Science Pub Date: June 1968 DOI: 10.1073/pnas.60.2.583 Bibcode: 1968PNAS...60..583L