1 glyco-bond=---- sugar=---- groove=---- planarity=0.222 type=other O+ nts=4 GGGG X.DG4,X.DG8,X.DG14,X.DG18 2 glyco-bond=---- sugar=---- groove=---- planarity=0.355 type=bowl-2 O+ nts=4 GGGG X.DG5,X.DG9,X.DG15,X.DG19 3 glyco-bond=---- sugar=---- groove=---- planarity=0.428 type=bowl O+ nts=4 GGGG X.DG6,X.DG10,X.DG16,X.DG20
In DSSR, a G4-helix is defined by stacking interactions of G-tetrads, regardless of backbone connectivity, and may contain more than one G4-stem.
In DSSR, a G4-stem is defined as a G4-helix with backbone connectivity. Bulges are also allowed along each of the four strands.