Oct3/4, Klf4, {TAIL ~ c Myc} and Sox2 produce {HEAD ~ induced pluripotent stem cells} 
Oct3/4 , Klf4 , { TAIL ~ c Myc } and Sox2 produce { HEAD ~ induced pluripotent stem cells }
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD