FIG. 1.
Morphological consequences of cse deletion. (A) Colony morphology pictured after 20 h of growth; (B) cell chain morphology of S. thermophilus CNRZ368 strains; (C) results from counting number of cells per chain. A total of 1,000 cells were counted from three independent cultures. Cells were photographed and counted in stationary phase after 20 h of growth. After this time of growth, OD600 values reached 0.66 ± 0.074, 0.56 ± 0.038, 0.50 ± 0.029, and 0.62 ± 0.022, respectively, for strains CNRZ368, CNRZ368-Δcse, CNRZ368-Δcse-T, and CNRZ368-Δcse-C.