3 distinct modifications were found.
Adjust pH of medium to 9.5 and replace sucrose with 5.0 g/l D-glucose added from a sterile anoxic stock solution after autoclaving.
Adjust pH of medium to 9.5.
Adjust pH of medium to 9.7 and replace sucrose with 5.0 g/l Casamino acids added from a sterile anoxic stock solution after autoclaving.