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/OMEGA-Speedmaster-Professional-Moonwatch-Co-Axial-Master-Chronometer-Chronograph-310-32-42-50-01-001-p19098/