Objective To construct β-site APP-cleaving enzyme 2 knockout zebrafish animal model and preliminarily explore its application. Methods By using the CRISPR / Cas9 technology,the gRNA against target in zebrafish was designed to induce mutations;afterwards the mutant was obtained by DNA sequencing. Results BACE2 homozygous mutants were unable to survive in the early part.Results of RT-PCR showed continued BACE2 gene expression in zebrafish early development. Conclusion BACE2 knockout zebrafish animal model may...