Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Cooperation of the propolins to induce cytotoxic effect in human melanoma cells. The cells were treated with varying concentrations (1.25–5.0 μg/ml of propolin C and propolin D) and combinations of propolin C and propolin D at the same concentrations (0.625 + 0.625 or 1.25 + 1.25 μg/ml) for 12 h and subsequent cell viability was measured by a trypan blue exclusion assay. Results represent the mean ± SE of three independent experiments.
