EM-SURFER

Quick Access to Search/Submission Page.

A web-based tool for real-time comparison and analysis of Electron Microscopy (EM) density maps. It compares the shape of EM map isosurfaces, generated using author-recommended contour values. Users can either upload an EM map or choose an existing map in the EMDataBank and compare it against maps stored in the EMDataBank. 3D-Zernike Descriptors (3DZD) are utilized for the efficient comparison between EM maps. The web interface will conveniently display a quantitative measure of similarty between the isosurface shape of EM maps, as well as a measure indicating how similar the target isosurface is to the maps retrieved in the search. EM-SURFER provides the users with the option of comparing EM maps using additional contour levels, based on the original values recommended by each map's authors. It also provides filtering features to compare the target only to maps with a similar volume.