Hard-to-transfect primary cells and stem cells are transfected with improved efficiency and lower toxicity with GlobalStem’s new GeneIn™ Transfection Reagent. A novel cationic chemistry allows GeneIn™ to offer a unique rapid optimization protocol that allows researchers to maximize the transfection efficiency in their cells. Validated on multiple cell lines, GeneIn™ is designed for transfecting primary cells and stem cells and is highly effective on commonly used cells.