Protocol for clonal isolation of gene-edited hiPSCs using droplet and microfluidic sorting.

Genetically engineered human induced pluripotent stem cells (hiPSCs) are vital for disease modeling and drug discovery, yet generating clonal lines efficiently post-editing remains challenging. Here, we present a protocol to generate clonal hiPSC lines after gene editing using either electrostatic droplet- or microfluidics-based sorting platforms. We describe steps for culturing hiPSCs, CRISPR-RNP electroporation, single-cell sorting, and expansion of gene-edited clones. Using this protocol, we generated over 100 clonal lines across seven knock-in/knock-out experiments, demonstrating broad utility and reproducibility. For additional details on the use and execution of this protocol, please refer to Patel et al.1.