1. Molecular interactions of ribosomal components

   • H. W. Schaup
   • M. Green
   • C. G. Kurland

   OriginalPaper Pages: 1 - 8

2. Somatic crossing-over in the housefly

   • R. Nöthiger
   • A. Dübendorfer

   OriginalPaper Pages: 9 - 13

3. DNA-dependent in vitro synthesis of enzymes of the galactose operon of Escherichia coli

   • Waldemar Wetekam
   • Karin Staack
   • Ruth Ehring

   OriginalPaper Pages: 14 - 27

4. Intra-cistronic complementation among trpC mutants of Escherichia coli

   • Houng-Zung Liu
   • Oliver H. Smith

   OriginalPaper Pages: 28 - 35

5. A correlation between sensitization to gamma-rays by purine starvation and the rec genes in Escherichia coli K-12

   • Jeremy E. Baptist
   • Frank M. Starkey
   • Dominic A. Scudiero

   OriginalPaper Pages: 36 - 42

6. The structure of the incompatibility factors of Schizophyllum commune: Constitution of the three classes of B factors

   • Yair Parag
   • Yigal Koltin

   OriginalPaper Pages: 43 - 48

7. Interspecific transformation and DNA characteristics in Allomyces

   • Mukti Ojha
   • Gilbert Turian

   OriginalPaper Pages: 49 - 59

8. Genetic fine structure and function of mutants at the ilv1-gene locus of Saccharomyces cerevisiae

   • P. Thuriaux
   • M. Minet
   • F. K. Zimmermann

   OriginalPaper Pages: 60 - 72

9. Host-genotype and agent effects in scrapie incubation: Change in allelic interaction with different strains of agent

   • A. G. Dickinson
   • Veronica M. H. Meikle

   OriginalPaper Pages: 73 - 79

10. The isolation of mutants conditionally defective in protein synthesis in Chlamydomonas reinhardi

    • Daniel McMahon

    OriginalPaper Pages: 80 - 86

11. High frequency of chromosome aberrations induced by DEB with caffeine posttreatment in Vicia faba var. minor

    • Z. Swietlińska

    Short Communication Pages: 87 - 90

12. Suppression of temperature sensitive mutants of bacteriophage T4 by bacterial opal suppressors

    • A. N. Maisurian
    • V. N. Pozdniakov

    Short Communication Pages: 91 - 92