
Pseudoknot-related classes of internal loops. (A) An internal loop in the absence of pseudoknots is called Classical. (B) An internal loop adjacent to a pseudoknot is called Isolated. (C) An internal loop involved in a pseudoknot is called Pseudoknotted. The graph has been prepared using R-chie (Lai et al. 2012) and forna (Kerpedjiev et al. 2015).










