5×103 UACC 903 and 1205 Lu melanoma cells were seeded in 96-well plates, followed by treatment with 0.62 to 100 μmol/L of empty control or abietic acid nanoliposomes or Nanolipolee-007 for 24 hours. Percentage proliferating or apoptotic cells were quantified by a colorimetric cell proliferation ELISA BrdU kit (Roche Applied Sciences, Indianapolis, IN) or fluorimetric Apo-ONE Homogenous caspase-3/7 assay kit as previously reported (Promega, Madison, WI) (21 (link)).