β-galactosidase activity measured in crude extracts of wild-type H. lacusprofundi (blue, ◊) and Halobacterium sp. NRC-1 (pMC2) (red, □) at different temperatures. The enzyme activity in Miller units (MU) for the former haloarchaeon is shown on the left and the latter is shown on the right. Values are the average of triplicate experiments with standard deviation shown with error bars.
Karan et al. BMC Biotechnology 2013 13:3 doi:10.1186/1472-6750-13-3