1. Preparation and characterization of a soluble nitrate reductase from Azotobacter chroococcum

   • M. G. Guerrero
   • J. Ma Vega
   • M. Losada

   OriginalPaper Pages: 287 - 304

2. Factors effecting the initiation of mitosis in Allomyces neo-moniliformis

   • Lauritz W. Olson

   OriginalPaper Pages: 305 - 311

3. Flagellar structure of the gametes of Ectocarpus siliculosus (Phaeophyta) as revealed by negative staining

   • Dieter G. Müller
   • Heinz Falk

   OriginalPaper Pages: 313 - 322

4. Cell and lorica fine structure of the chrysomonad alga, Dinobryon sertularia Ehr. (Chrysophyceae)

   • Werner W. Franke
   • Werner Herth

   OriginalPaper Pages: 323 - 344

5. Electron microscopy of selectively stimulated microconidiogenesis in wild type Neurospora crassa

   • C. Rossier
   • N. Oulevey
   • G. Turian

   OriginalPaper Pages: 345 - 353

6. Structure and plugging of septa of wild type and spreading colonial mutants of Neurospora crassa

   • A. P. J. Trinci
   • Annette J. Collinge

   OriginalPaper Pages: 355 - 364

7. Changes in proteins and isoenzymes in leaves of wheat when infected by stem rust

   • Damon S. M. Cheung
   • Haydn J. Willetts

   OriginalPaper Pages: 365 - 372