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The behavior of LP in the presence and absence of PY inhibition. Without PY inhibition, the time t1 is calculated from the moment LP falls back to the silent state, associated with the onset of AB activity (t=0; top arrow) to the jump point. When PY inhibition is present (the bold trajectory), the onset of AB activity occurs at a lower point on the left branch of the vLP nullcline (t=0; middle arrow) and t1 is calculated from this moment to the jump point and is therefore much smaller.
