21. Letter from Arthur Kornberg to Edwin G. Kreb Publication: Produced: 17 February 1949 Subject(s): EnzymesHospitalsNational Institutes of Health (U.S.) Archival Collection: The Arthur Kornberg Papers (Profiles in Science)
22. Letter from Arthur Kornberg to Severo Ochoa Publication: Produced: 24 January 1949 Subject(s): EnzymesYeasts Archival Collection: The Arthur Kornberg Papers (Profiles in Science)
23. Genetic Recombinations Leading to Production of Active Bacteriophage from Ultraviolet Inactivated Bacteriophage Particles Publication: Genetics Society of America, March 1949 Subject(s): BacteriophagesRecombination, Genetic Archival Collection: The Salvador E. Luria Papers (Profiles in Science)
24. Memorandum to Marcus Rhoades (about the Ds Locus) Publication: Produced: January 1949 Subject(s): ChromosomesChromosome BreakageMutation Archival Collection: The Barbara McClintock Papers (Profiles in Science)
25. Memorandum to Marcus Rhoades (about the Ds Locus) [pages 1-25] Publication: Produced: January 1949 Subject(s): MutationChromosome BreakageGene ExpressionGenetics Archival Collection: The Barbara McClintock Papers (Profiles in Science)
26. Memorandum to Marcus Rhoades (about the Ds Locus) [pages 26-54] Publication: Produced: January 1949 Subject(s): MutationRing ChromosomesGene ExpressionGenetics Archival Collection: The Barbara McClintock Papers (Profiles in Science)
27. Memorandum to Marcus Rhoades (about the Ds Locus) [Appendix] Publication: Produced: January 1949 Subject(s): GeneticsZea maysMutation Archival Collection: The Barbara McClintock Papers (Profiles in Science)
28. The Ds Locus. Part III. Transposition of the Ds Locus Publication: Produced: [April 1949 - January 1950] Subject(s): Zea maysCrossing Over, GeneticCytogeneticsChromosome BreakageMutation Archival Collection: The Barbara McClintock Papers (Profiles in Science)
29. The Ds Locus. Part III. Transposition of the Ds Locus (Title Page and Table of Contents) Publication: Produced: [April 1949 - January 1950] Subject(s): Zea maysCrossing Over, GeneticCytogeneticsChromosome BreakageMutation Archival Collection: The Barbara McClintock Papers (Profiles in Science)
30. The Ds Locus. Part III. Transposition of the Ds Locus (pages 1-27) Publication: Produced: [April 1949 - January 1950] Subject(s): Zea maysCrossing Over, GeneticCytogeneticsChromosome BreakageMutation Archival Collection: The Barbara McClintock Papers (Profiles in Science)