Recall that a function can be thought of as a machine which takes an input in (say x) and then depending on what that input is, it returns an output (say y) by some predefined rule (say f). The graph ...

Brief Communication Published: 21 May 2007 Engineering synthetic signaling proteins with ultrasensitive input/output control John E Dueber, Ethan A Mirsky & Wendell A Lim Nature Biotechnology 25 ...