Chemistry Solid State Structures Biophysical Chemistry Databases Journals Physics and Astronomy Kitchen Chemistry Other Interesting Links   Biophysical Chemistry Biophysical Society   LIPIDAT A database of phase transitions in lipids   Avanti Polar Lipids Premier supplier of lipids   Helical Wheel Java Applet This applet at the University of Ottawa draws an axial projection of a regular alpha-helix.  Residues are color coded by charge and hydrophobicity   Oligonucleotide Properties Calculator Calculate the melting temperature and more for DNA and RNA oligos. Northwestern University