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Hybridization induced changes in cantilever deflection under two conditions. The 30-nt-long probe ssDNA were immobilized at 1 M PB concentration. In one case, hybridization occurred at 1 M PB concentration, which led to upward cantilever motion. In the second case, the PB concentration was first reduced to 0.1 M, after which hybridization occurred. In this case, the cantilever deflection was downward.
