TEM images of C. ljungdahlii appendages in different growth conditions.
C. ljungdahlii was grown in tubes without (left) or with (middle) the addition of 200 mM NaCl to the medium. In addition, C. ljungdahlii was grown with 200 mM sodium pyruvate, while fructose was omitted from the medium (right). After 2 days of incubation, cells were harvested and grids were prepared as described in the text. The scale bars are 500 nm.