This 10-minute introduction was prepared to accompany a lecture in Biology 100 at the University of Massachusetts, Amherst MA US. Supported by an Instructional Technology Grant from the Office of the President of the University of Massachusetts.

16-bit Chime (Windows 3.1) is too slow -- this tutorial will work optimally with 32-bit Chime (Windows 95) or on a fast PowerPC-Macintosh. (Unlike the case with RasMol, 32-bit Chime will not operate under Windows 3.1 supplemented with Win32SOle.)

This tutorial runs in a fixed 640 x 480 pixel window designed for projectors with that resolution.

If you have a copy of this tutorial on your computer's hard disk, you can display it in Netscape without an Internet connection. Copies are available to be downloaded. Version 2.0 was released January 2, 1997. It has been tested thoroughly on Windows 3.1 and Windows 95. Further changes may be needed for Macintosh and unix. Check with the original source periodically to find out if changes have been made. Significant changes will be indicated by a different version number at the top of this page.

• This REQUIRES Navigator 3.01 and Chime 1.0! Navigator 4.0, IE3, IE4 will NOT work.
• How to use Chime

• Protein Secondary Structure -- Start Here. Starting here, you can go through the entire tutorial without returning to this menu. The headings below are provided only to show the contents and to allow entry at selected points.

• Alpha Helix
  • Hydrogen bonds
  • Alpha carbons, alpha helix
  • Helix in situ (Lysozyme), Amphipathicity

• Beta Strands/Pleated Sheet
  • Beta strands hydrogen-bond to form a beta sheet
  • Beta sheet in situ, alpha helix, Lysozyme

• Further Resources on Protein Secondary Structure

• Design and Methods: Linear Control Structure version 2. Read this if you want to build a linear presentation with a control structure similar to this one. Try playing this script in its development/debugging mode, and see the instructions for building your own linear tutorial about the molecule(s) of your choice by substituting different content into the html/javascript control structure of this tutorial.