FIG. 4.
Swarming in the presence (2 mM CaCl2) and absence (−CaCl2) of CaCl2 on 1/2 CTT 0.5% agar plates. The pictures were taken at 6 days for DK320 (aglB1 pilQ1) and DK8616 (aglB1 ΔpilQ) and at 6 h for DK1217 (aglB1 pilQ+).
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