Electrical properties and ultrastructure of Mycoplasma membranes

Mycoplasma, in particular species laidlawii and gallisepticum, are found to have a very small, low frequency conductivity as would be predicted by the dielectric model for bacteria and their apparent lack of cell wall structure. Membrane capacitance values for the two organisms are both about 0.9 muF/cm(2), although electron micrographs show that the membrane of M. gallisepticum is 20-40 A thicker than that of M. laidlawii.