This transgene consists of the cytomegalovirus immediate early enhancer-chicken beta-actin hybrid (CAG) promoter, a floxed lacZ gene, human FUS cDNA with the R521C mutation, IRES, and EGFP coding sequences. Cre-excision of the loxP flanked lacZ DNA allows for translation of FUS and EGFP. Two lines were generated: 673, and 682. Line 682 was chosen as a representative line.