Figure 7From: Stable luciferase expression does not alter immunologic or in vivo growth properties of GL261 murine glioma cells In vitro luciferase expression of GL261.luc over 21Â days. GL261.luc cells were maintained in culture over 21Â days. At day 0, 7, 14, and 21, cells were seeded in 6-well plates at a defined density and were evaluated for bioluminescence. GL261 and U87.luc cells were used as negative and positive controls, respectively.Back to article page