Nukleinsavak - Szerves Kémiai Tanszék

Oligo(poli)nukleotidkonformációNucleic acidequivalent of theRamachandranplot illustrating thetheoreticallyallowed angles ofζ and α.Illustration of oligo-polydeoxynucleotide chain sectionhighlighting the two atomic segments C4 C3 O3 P (lightblue) and P O5 C5 C4 (red). Each segment acts as arigid, coplanar unit, hence behaves as a virtual bondpivoting at phosphate. Key dihedral angles involved thatcharacterise conformation are ζ, the angle subtendedabout the O3 P bond and α, the angle subtended aboutthe P O5 bond. The same arguments apply in oligopolynucleotidechains too.