Nature 420, 231–237 (2002).

In this Insight Review Article, the right panel of Fig. 3c incorrectly appeared blank. Figure 3c should have appeared as shown:

Figure 3c: The dynamic behaviour of the two switches subject to similar noisy X signals was simulated using the Gillespie algorithm.
figure 1

The hysteresis of the first switch provides a buffer so that the switch is robust to noise. The second switch, which is ultra-sensitive and lacks such a buffer, is sensitive to noise and subject to accidental switching (indicated by arrow). Hysteretic switches provide one mechanism to reduce switching chatter.

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