1. Direct spectrophotometric determination of proteins immobilized on bead cellulose and dissolved in cadoxene

   • Peter Gemeiner
   • Mikuláš Pašteka

   Original Articles Pages: 381 - 393

2. Studies of a photosynthetic photoelectrochemical cell using various electrodes

   • D. G. Sanderson
   • R. L. Pan
   • E. L. Gross

   Original Articles Pages: 395 - 405

3. Amperometric assay for collagenase

   • That T. Ngo
   • Howard M. Lenhoff

   Original Articles Pages: 407 - 414

4. Enzymatic synthesis ofS-adenosyl-l-methionine froml-methionine and ATP

   • Akiva Gross
   • Shimona Geresh
   • George M. Whitesides

   Original Articles Pages: 415 - 422

5. Enzyme engineering

   • William H. Rastetter

   Review Pages: 423 - 436

6. Food microbiology update emerging foodborne pathogens

   • R. G. Bryant

   Review Pages: 437 - 454

7. Patents and literature

   • Ernest W. Boyer

   Announcement Pages: 455 - 463

8. News and views

   • Linda L. Lasure

   News Pages: 465 - 465

9. Methane—Fuel, for the future Patrick MicGeer and Enoch Durbin, eds.

   • Ralph A. Messing

   Book Review Pages: 466 - 466