Contains high titer polycistronic lentivirus and Polybrene transfection reagent that have been validated for generation of mouse and human induced pluripotent stem cells. MilliporeSigma™; STEMCCA Constitutive Polycistronic (OKSM) Lentivirus Reprogramming Kit is comprised of the transcription factors Oct-4, Klf4, SOX-2, and c-Myc (OKSM), separated by the self-cleaving 2A peptide and IRES sequences.