| To test the nature of the electrostatic interactions occurring between retinal and the protein, a series of retinal analogues with incrementally shortened ;Spontaneous switching of the rotation sense of the flagellar motor of the archaebacterium halobacterium halobium and modulation of the switch by attractant and repellent photostimuli were analyzed by using a computerized cell-tracking system.;The data fit a three-state model of the switch, in which a Poisson process governs the transition from state N (nonreversing) to state R (reversing). After a reversal, the switch returns to state N, passing through an intermediate state 1 (inactive), which produces a ca. 2-s period of low reversal frequency before the state N Poisson rate is restored. |
