Figure 1

Typical pilus-1 expression rates of each of the S. pneumoniae strains/populations.
The strain analysed is indicated on the top and the population on the right. Quantification of pilus-1 expression rates by FC and IIF are shown on the bottom of the corresponding panel. FC analysis profile: positions of pilus-1-positive or -negative peaks are indicated on the top. IIF: the area of each image is about one third of one of the microscope fields used for quantification; bars = 25 μm. High-brightness images are shown for better readability.