FIG. 7.

Influences of glycine betaine and methionine on the growth of the bmt mutant. The bmt mutant was grown in LAS medium lacking NaCl (A) or containing 0.5 M of NaCl (B) without any supplementation (open triangles) or in the presence of 1 mM glycine betaine (open circles), 1 mM methionine (open squares), 1 mM glycine betaine plus 1 mM methionine (closed diamonds), or 1 mM glycine betaine plus 1 mM homocysteine (closed circles). The growth rates of the bmt mutant in LAS medium were identical in the absence and in the presence of 1 mM homocysteine. OD₅₇₀, optical density at 570 nm.