1. Isolation, properties and cellular distribution of Dl, a chromosomal protein of Drosophila

   • Candido Rodriguez Alfageme
   • George T. Rudkin
   • Leonard H. Cohen

   OriginalPaper Pages: 1 - 31

2. Features of in vitro puffing and RNA synthesis in polytene chromosomes of Chironomus

   • Heinz Sass

   OriginalPaper Pages: 33 - 78

3. Mechanisms of chromosome orientation revealed by two meiotic mutants in Drosophila melanogaster

   • Lawrence S. B. Goldstein

   OriginalPaper Pages: 79 - 111

4. Analysis of crossing over in mouse meiotic cells by BrdU labelling technique

   • N. Kanda
   • H. Kato

   OriginalPaper Pages: 113 - 121

5. The basis of chromatin fiber assembly within chromosomes studied by histone-DNA crosslinking followed by trypsin digestion

   • Vicente J. Goyanes
   • Sei-ichi Matsui
   • Avery A. Sandberg

   OriginalPaper Pages: 123 - 135