Protocol for conditional mutagenesis in zebrafish germ cells using Tol2 transposon and a CRISPR-Cas9-based plasmid system

Here, we present a protocol for conditional mutagenesis in zebrafish germ cells using Tol2 transposon and a CRISPR-Cas9-based plasmid system. We describe steps for conditional mutagenesis plasmid construction, zebrafish embryo microinjection, and screening for green fluorescence in the heart. This protocol is simple to execute, time efficient, and multifunctional, enabling the disruption of genes in zebrafish germ cells to be conducted with ease. For complete details on the use and execution of this protocol, please refer to Hu et al.1.