"Algebras/DotBracket/alg_pknot_dotBracket.gap" is a copy of Algebras/DotBracket/alg_dotBracket.gap, but extended to also cover pseudoknots. To unambiguously print crossing base-pairs we need further types of pairs. Thus, the alpha helix of a pseudoknot is represented by [
and ]
; beta helix by {
and }
and gamma helix (only for pKiss) by <
and >
.