Linking the ATPase domain to the Toprim fold is a helical element known as the transducer domain.
2.
In the housed-elements design the static mixer elements consist of a series of helical elements can simultaneously produce patterns of flow division and radial mixing:
3.
A sinusoidal form might suggest some kind of cleaning or reconditioning machine which moves a helical element down the track, but this doesn't look to be the case for this track . talk ) 11 : 35, 10 July 2009 ( UTC)