sentence: The hNSCs labeled with tat-CLIO contained 2.15 ± 0.3 Fe pg / cell , which was 59-fold , 430-fold and 6-fold higher than those of the hNSCs labeled with ferumoxides , monocrystalline iron oxide ( MION ) or CLIO-NH , respectively 53.Low molecular weight protamine ( LMWP , VSRRRRRRGGRRRR ) possessed with high arginine content and significant sequence similarity to that of TAT , was derived directly from native protamine by enzymatic digestion with thermolysin .