Ribosome-Bound β-GALACTOSIDASE Cowie, D. B. ; Spiegelman, S. ; Roberts, R. B. ; Duerksen, J. D. Abstract Publication: Proceedings of the National Academy of Science Pub Date: January 1961 DOI: 10.1073/pnas.47.1.114 Bibcode: 1961PNAS...47..114C