1. Which mitochondrial proteins are involved in susceptibility toHelminthosporium Maydis Race T?

   • Jonathan D. Walton

   Review Pages: 101 - 103

2. On being selective: Mutants from cultured cells

   • Carole P. Meredith

   Review Pages: 105 - 110

3. Functions of the translation products of RNA plant viruses

   • Milton Zaitlin

   Review Pages: 111 - 115

4. The production of higher plant subprotoplasts

   • Peter M. Bradley

   Review Pages: 117 - 123

5. High-resolution gel and hybridization analysis of plant mitochondrial RNA

   • Brian S. Masters
   • Douglas M. McCarty
   • William W. Hauswirth

   Experimental Protocols Pages: 125 - 130

6. Rapid CsCl gradients in fixed angle rotors for purification of viruses and organelle DNA

   • Laurence K. Grill
   • O. Mitch Griffith
   • Stephen J. Garger

   Experimental Protocols Pages: 131 - 136

7. An assessment of the role of cytoplasmic-genetic systems in hybrid wheat production

   • Ian B. Edwards

   Genetic Resources Pages: 139 - 143

8. Rapid announcements

   Announcement Pages: 145 - 146