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Colony edges of wt and motility mutants in unstressed (Left) and compressed (Right) plates. The compressing tube (not visible in this field) is located above the colony, and the stress force is vertically downward. Two microliters of a cell suspension at a calculated density of 1,000 Klett units was spotted in unstressed and compressed plates, and incubated at 33°C for 3 hr. (A) wt (A+S+, DK1622). (B) A+S− (DK10407). (C) A−S+ (ASX1).
