| Modification Notes |
Vibrio Fischeri is a strain of bioluminescent bacteria found in various niches in marine environments. It lives as a symbiont with some fish and squids that have light-emitting organs. V. fischeri cells can produce bioluminescence because of the expression of the lux operon, LuxI, which is used extensivley as a marker. The color of the bioluminescense emission of the luciferace is regulated by the Yellow fluorescent protein (YFP), an antenna protein. YFP can form a homodimer and contains two lumazine-binding domains. In normal conditions YFP emits at 485nM but at temperatures below 20 degrees Celsius and in the prescence of YFP, luciferase exhibits an emission spectrum at 545nM, giving a yellow color. Vibrio logei is another species of luminous bacteria that gives a similar luminescence to V. Fischeri and can co-exist with V. Fischeri in the same species. |