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Table 4 Completed retargeting projects. All have transmitted the floxed allele. The NA designates “not applicable” to those targets where allele-specific gRNAs were used, and no Cre assay was performed

From: Highly reliable creation of floxed alleles by electroporating single-cell embryos

Target Live births Pups with both loxPs Positive/tested for Cre assay Germline transmission confirmed
Nmnat2 124 22 NA Yes
Slc38a9 32 3 NA Yes
Zfhx4 40 2 1/2 Yes