A simple pseudoknot, formed by helices and , with intervening sequences

<p><b>Copyright information:</b></p><p>Taken from "Design, implementation and evaluation of a practical pseudoknot folding algorithm based on thermodynamics"</p><p>BMC Bioinformatics 2004;5():104-104.</p><p>Published online 4 Aug 2004</p><p>PMCID:PMC514697.</p><p>Copyright © 2004 Reeder and Giegerich; licensee BioMed Central Ltd.</p> If the internal parts contain further secondary structures, we call it a simple recursive pseudoknot.