Abstract: The invention relates to a method for promoting the modification, preferably by homology-dependent repair (HDR), of a target site in a genome of a cell. The method comprises the steps of introducing a template DNA molecule and one or more DNA repair inhibitors into a cell which comprises or is capable of expressing a site-specific DNA endonuclease (e.g. Cas12a). The DNA repair inhibitors comprise BAY598, together with one or more other inhibitors. The invention also relates to kits comprising the aforementioned DNA repair inhibitors.

Abstract: The invention relates to a method for promoting the modification, preferably by homology-dependent repair (HDR), of a target site in a genome of a cell. The method comprises the steps of introducing a template DNA molecule and one or more DNA repair inhibitors into a cell which comprises or is capable of expressing a site-specific DNA endonuclease (e.g. Cas9). The DNA repair inhibitors comprise one or more aurora kinase inhibitors, wherein the aurora kinase inhibitors are selected from the group consisting of AT9283, PHA-680632, TAK-901 and CCT137690, together with one or more other inhibitors. The invention also relates to kits comprising the aforementioned DNA repair inhibitors.