LC50 on HeLacells(μg/mL) LC50 on Vero cells(μg/mL) Dextran ≥ 3000 NIPAM monomer 700 ( ± 6) 700 ( ± 6) p(NIPAM) ≥ 3000 p(NIPAM-co-5% LY) ≥ 3000 PEI 0.7 ( ± 0.2) 3 ( ± 0.9)

Table 2: LC50 of dextran, NIPAM monomer, p(NIPAM), p(NIPAM-co-5% LY) and PEI on HeLa Vero cells.