The application belongs to the field of
molecular biology, and particularly relates to a method for efficiently constructing
large fragment deletion of
zebrafish helt
gene and application. The method for efficiently constructing
large fragment deletion of
zebrafish helt
gene is applied to constructing an
animal model for treating and
drug screening of Alzheimer
disease caused by
large fragment deletion of
genome. The application also provides a method for efficiently constructing large fragment deletion of
zebrafish helt
gene. Through design of a target and a primer, a
mutant with large fragment deletion of zebrafish helt gene is obtained. The
CRISPR / Cas
system is used to perform
genome large fragment deletion in a zebrafish helt
gene cluster. The length of the deleted
genome fragment ranges from 1.4 kb, and the average efficiency reaches more than 60%, which greatly improves the efficiency of genome large fragment deletion.