Bioluminescence by luciferase was observed using Luminoview LV200 (Olympus, Osaka, Japan). Luminescence was acquired in MetaMorph® imaging system (Molecular Devices, Sunnyvale, CA). Pv11 cells were attached onto a 35 mm glass bottom dish (AGC Techno Glass Co., Ltd., Tokyo, Japan) using 50 µg/ml cationic polymer, Polyethyleneimine “Max” MW 40000 (Polysciences, Inc., Warrington, PA). The cationic polymer was prepared as described previously41 (link). D-luciferin potassium salt (Wako Pure Chemical Industries, Osaka, Japan) was dissolved in distilled water and kept at 4 °C in the dark until use.
Free full text: Click here