RNA breaks destined for repair are inflicted by sequence-specific or structure-specific endoribonucleases during ... termini via three nucleotidyl transfer steps similar to those of DNA ligases: (Step ...

(APC = anaphase-promoting complex, CEN = centromeric DNA, and SCF = Skp, Cullin, F-box-containing ubiquitin-ligase complex.) ...

After two fragments with complementary sticky ends are joined, the DNA backbone may be covalently sealed using another enzyme called DNA ligase.