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1191. The Structure of Collagen

1193. On Protein Synthesis

1194. The Present Position of the Coding Problem

1195. DNA

1196. The Two Languages of Biology

1197. The Molecular Structure of Polyadenylic Acid

1198. The Theory of Mutagenesis [Editorial letter]

1199. General Nature of the Genetic Code for Proteins

1200. Towards the Genetic Code