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. A: RNA sequence CRW_00490 of subclass 3A with pseudoknot pattern ABACDEFGEHGIJIFHKBKDJC. B: RNA sequence CRW_00527 of subclass 3B with pseudoknot pattern ABCDEFDGFHIHEGJAJCIB. C: RNA sequence PDB_00628 of subclass 3C with pseudoknot pattern ABACDEDFGFECHBHIGI. D: RNA sequence CRW_00525 of subclass 3D with pseudoknot pattern ABACDEFDGFHIHEGJBJIC. (Stem color, blue: major stem; green: intermediate stem; red: minor stem).
