Celetrix LLC 1 article published in JoVE Genetics CRISPR/Cas9 Ribonucleoprotein-mediated Precise Gene Editing by Tube Electroporation Linyuan Ma*1, Lydia Jang*1, Jian Chen2, Jun Song1, Dongshan Yang1, Jifeng Zhang1, Y. Eugene Chen1, Jie Xu1 1Center for Advanced Models for Translational Sciences and Therapeutics, Department of Internal Medicine, University of Michigan Medical Center, 2Celetrix LLC Presented here is a protocol for efficient CRISPR/Cas9 ribonucleoprotein-mediated gene editing in mammalian cells using tube electroporation.