Figure 5
From: Neuromelanin is an immune stimulator for dendritic cells in vitro
Negative test of LPS contamination. The DAM- and NM-preparations used in this study were tested with an endpoint chromogenic LAL-assay for LPS contamination at a concentration of 50μg/ml and analyzed at a wavelength of 405 nm. LPS standards with a concentration range between 0.1-1.0 EU/ml were tested positive, whereas the DAM and NM-preparations were tested negative for LPS.