I would like to assess the editing efficiency of designed guide RNAs by transfection prior to establishing a stable KO cell line (via lentiviral infection). HEK293T cells are very efficient when assessing gRNA targeting human genes. However, I will be using a mouse model in parallel with the stable cell lines and would like a stable mouse cell line. Any suggested cell lines would be appreciated, along with the transfection media used and observed transfection efficiency.