jeff101 Lv 1
http://foldit.wikia.com/wiki/Distance_Maps and http://memorize.com/distance-and-contact-maps show Distance and Contact Maps along-side their respective 3D images for many different proteins. Images are classified as in the SCOPe database (http://scop.berkeley.edu), and http://memorize.com/distance-and-contact-maps can shuffle the images in multiple-choice and matching modes to help you learn the patterns in them.