" Photosynthesis on the web 2002" site, this has many links to other sites
http://www.life.uiuc.edu/govindjee/photoweb/#Comprehensive
International Carotenoid Society, many facts including carotenoid structures
Properties of Detergents (Amphiphiles)
http://psyche.uthct.edu/shaun/SBlack/detergnt.html
An up to date list of membrane proteins with known 3D-structures
