LumiCycle performs high-throughput luminometry on self-luminous tissues, such as those from transgenic animals containing the luciferase gene. The system is equipped with 4 photon-counting photomultiplier tubes, each selected for low dark counts and high sensitivity in the green portion of the spectrum at which luciferase emits light. 32 tissue samples, each in a 35 mm Petri dish, can be counted at one time. 8 dishes share each photodetector using a turntable device that alternately brings each dish under the detector, one at a time. (Specifications.)
The LumiCycle apparatus fits inside a standard incubator. An internal fan circulates the incubator air to maintain the proper temperature within the chamber. The temperature is therefore as stable as the incubator can make it. The turntable and photon counting are fully automated. System setup and operation is straightforward. Online help files are included with the software.
Two-color option. With the 2-color adaptation, colored filters can be placed on 2 of the photomultipliers so that 16 samples can be recorded simultaneously in 2 different colors. To create the image on the right, fibroblasts were transfected with Bmal-Nluc and Per2-Fluc, and recorded with a 550 nm long-pass filter on one PMT and 500 nm short-pass filter on the other. Optical filters can be easily changed by the user, or they can be removed for recording in the standard, non-color mode.
In addition to its high-precision photon counting hardware, LumiCycle has the most flexible and easy-to-use software for the collection and analysis of circadian rhythms in luminometry data.