Lentiviral vectors used in IPSC production.

<p>LTR: viral LTRS, EF1A-IN: elongation factor 1-alpha promoter, PGK: PGK promoter, M: cMyc, O: Oct4, S: Sox2, K: KLF4, L: Lin28, N: Nanog transgenes. 2A: translation interruption element, IRES: internal ribosomal entry site, Puro: puromycin resistance gene.</p>