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Experiments with a population of cells with fluorescent motors. (A) Cells bleached in S (red) or P (blue) excited in S and read in S (upper curves; lines and circles) or exited in S and read in P (lower curves; no symbols). (B) Cells bleached in S (red) or P (blue) excited in P and read in P (upper curves; circles) or excited in P and read in S (lower curves; no symbols).
