In this section, advanced complex searches can be performed using a flexible query builder.
1. Search structures with crystallographic resolution better than 2 Å.
2. Search all A-form AG dinucleotides which opposite dinucleotides adopt B-DNA conformation.
3. In crystal structures search all base pairs that have stretch between 0 and 1 and neighbour base pairs of which have modified residues and delta torsion bigger than 30 degrees.