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. Author manuscript; available in PMC: 2016 Sep 7.
Published in final edited form as: Nat Rev Mol Cell Biol. 2014 Aug 16;15(9):615–628. doi: 10.1038/nrm3853

Table 1.

Mechanisms by which different models account for experimentally observed cargo behavior.

Model Experimentally Observed Cargo Behavior
End of run Pause state Rescue from pause
Tug-of-War Stall due to stochastic
motor detachment or
attachment of
opposing motor
Both motors stalled
in “a draw” (with
potential cargo
deformation).
One motor wins, other
motor detaches or
backsteps (with potential
recoil of cargo)
Microtubule
Tethering
Motor switches to
diffusive state
Both motors bound
in diffusive state
Motor switches to
moving state
Mechanical
Activation
Motor switches into
inactive state
Either both
detached or both
bound and stalled
Thermal or motor-driven
mechanical activation
Steric
Disinhibition
Motor switches into
inhibited state
Both detached, or
one or both attached
but inactive
Release from inhibited
state