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Tumble regulator

The proposed model for the transduction of chemotactic signals via CheY, the tumble regulator, includes which of the folloveing ... [Pg.605]

Similarly, chemotactic behaviour of bacteria is controlled by Ca . Mobile bacteria swim towards certain chemicals and away from others. Such bacteria can swim smoothly in a straight line or tumble, which results in random changes in direction. When heading towards repellents bacteria tumble more frequently to increase the probability of swimming away. Influx of Ca causes tumbling. Such behaviour has been found for Bacillus subtilis but apparently not for E. co/i. Calcium accelerates the swimming speed of Chlamydomonas reinhardii and regulates reverse motion in phototactically active Phormidium uncinatum and Halobacterium halobium. Phototaxis in H. halobium involves a methylation-demethylation process which is calcium dependent. Attractant stimuli raise the level of methylation of membrane proteins, while repellent stimuli cause demethylation and the enhanced opportunity for reversal of direction. Ca " " deactivates the methyl transferase and activates a methyl esterase. ... [Pg.6740]

Overall rotational tumbling is regulated by frequent collisions with light water molecules. For a nearly rigid protein, this physical model should lead to diffusive rotational behavior, where the reorientation of a unit vector attached to the molecule undergoes a random walk on the surface a sphere. If c(n, t) is the probability density for finding the vector pointing direction n at time f, a spherical molecule should follow a simple diffusion equation [31,32] ... [Pg.147]

Also necessary is a large-capacity tumble dryer, with drum at least 100 cm in diameter, having precisely controlled centrifugal acceleration horizontally directed air flow, parallel to the drum axle and precision electronics to regulate temperature and residual moisture... [Pg.1501]

See other pages where Tumble regulator is mentioned: [Pg.125]    [Pg.127]    [Pg.127]    [Pg.125]    [Pg.127]    [Pg.127]    [Pg.486]    [Pg.148]    [Pg.452]    [Pg.1094]    [Pg.595]    [Pg.148]    [Pg.469]    [Pg.551]    [Pg.19]    [Pg.34]    [Pg.253]    [Pg.595]    [Pg.2305]    [Pg.324]    [Pg.327]    [Pg.18]    [Pg.336]    [Pg.452]    [Pg.376]    [Pg.181]    [Pg.242]    [Pg.2288]    [Pg.718]    [Pg.160]    [Pg.148]    [Pg.63]    [Pg.5]    [Pg.29]    [Pg.490]    [Pg.82]    [Pg.64]    [Pg.64]    [Pg.86]    [Pg.149]    [Pg.300]    [Pg.256]    [Pg.130]    [Pg.371]    [Pg.312]    [Pg.134]   
See also in sourсe #XX -- [ Pg.127 ]



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