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Fluorescence images of three strains of Caulobacter and EYFP in a gel. All images are scaled by the intensity of their illumination and are displayed on an identical grey scale. (A) Strain EJ148, expressing PleC-EYFP. (B) Strain EJ153, expressing soluble, cytoplasmic EYFP. (C) Strain CB15N, wild-type Caulobacter. (D) EYFP molecules immobilized in an agarose gel. (Scale bar: 1 μm.)
