At the bottom of the page http://cmgm.stanford.edu/classes/grasp/ is the code how to colour code hydrophobic residues with GRASP - this is not a calculation, I'm afraid, just colour coding. As far as I know GRASP does not have a web-interface. You can install grasp in a Windows installation within a Virtual Machine (e.g. virtualbox), so you can run it on your linux (mac) box. I only installed grasp within Virtualbox without really testing it, so I am not sure how it would perform graphic wise. Tim -- Tim Gruene Institut fuer anorganische Chemie Tammannstr. 4 D-37077 Goettingen GPG Key ID = A46BEE1A On Thu, 6 Nov 2008, Sebastiano Pasqualato wrote: > > Hi all, > I'd love to have a surface representation of my structure in which I > plot the hydrophobic exposed residues. > A bit like an electrostatic potential plotted onto the surface, but > rather than hydrophilic, an hydrophobic one. > Is there a nice web server or a program that does that or you guys > just color hydrophobic amino acids and show the surface? > Thanks in advance, > s > > -- > Sebastiano Pasqualato, PhD > IFOM-IEO Campus > Dipartimento di Oncologia Sperimentale > Istituto Europeo di Oncologia > via Adamello, 16 > 20139 - Milano > Italy > > tel +39 02 9437 5094 > fax +39 02 574 303 310 >