A Search Tool for Similar RNA 3D Substructures RadioBtn Run Examples Enter PDB ID Upload Files Examples choose1DK1 (Chain B)1MJ1 (Chain C)1MFQ (Chain A) Enter PDB ID (4 characters only, ex. 1MFQ) PDB File (Required) BPSEQ File Enter Chain(s) ex. A,B (to select chains A and B) Leave Empty to Select All Chains