Welcome the the CHEM 785 Amino Acid Tutorial.
On the left you  should see a menu lisint of all 20 standard amino acids.  By clicking your pointer on any residue and clicking one, you will be taken to an informational page on that residue.  There is a two-dimensional representation as well and a three-dimensional view.  To view the 3-D image your Netscape browser must have the Chemscape Chime Plugin.  You can download this directly from the address below:
http://www.mdli.com/chemscape/chime/download.html

To move the molecule, place your pointer on the image and press the left hand button of your mouse.  With the button depressed, the movements of your mouse will be mimiced by the image.  To change style, perspective of color, etc. of the image, point to the image and depress the right hand mouse button.  A number of options will appear.  Try out a variety to get familiar with what you can do with the image.