Abstract Background Searching a database of protein structures for matches to a query structure. or occurrences of a structural motif. is an important task in structural biology and bioinformatics. While there are many existing methods for structural similarity searching. https://www.spidertattooz.com/G-G-SSG-1-USR-Airsoft-AEG-Rifle-w-Variable-Angle-Stock-ETU-MOSFET-Red/