| NHEJ | Deletion breakpoints have an insertion 1–10 bp or homology < 2 bp |
| FoSTeS/MMBIR | Deletion breakpoints have an insertion > 10 bp |
| alt-EJ | Deletion breakpoints do not have an insertion and homology 2–100 bp |
| NAHR | Deletion breakpoints do not have an insertion bit have an homology > 100 bp |