Contractile machines performed

Contractile Machines That Perform Mechanical Work by Pulling... 

Such shape changes cause contractile protein-based machines to perform mechanical work. 

As shown in the hexagonal array in Figure 5.22, five different energy inputs can perform mechanical work by the consilient mechanism. The set of elastic-contractile model proteins capable of direct utilization of hydrophobic association for contraction are called protein-based molecular machines of the first kind. These are enumerated below with brief consideration of the reversibility of these machines. 

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