Membrane potential and ph control in the cyanobacterium synechococcus r 2 anacystis nidulans pcc 7942 Ritchie, R.J. Journal of Plant Physiology 137(4): 409-418 1991 0176-1617 10.1016/s0176-1617(11)80309-3 https://eurekamag.com/research/007/544/007544194.php