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In cells, motor proteins do not work alone but rather move in ensemble when they support several cellular functions including mitosis and beating of flagellum. Until now, collective transportation by motors was poorly understood due to the experimental difficulty in controlling the number and arrangement of motors, which are considered to affect the transportation. In this report, we propose a novel...
We propose a nano-patterning method to control the number of kinesin motors involving in a collective transport of a single microtubule (MT) filament. We fabricated Au nano-pillar array on a thermally oxidized silicon substrate. SiO2 surface was selectively coated with poly(ethylene glycol) (PEG) self-assembled monolayer (SAM) and was rendered inert to protein adsorption. Streptavidin was immobilized...
This paper describes a method for controlling the velocity of gliding microtubules by light irradiance on a gold-patterned surface. The light was used to control the temperature of the buffer solution by heat transfer from the thin gold film. Microtubule velocity increased approximately 1.8-fold from the initial velocity at the 13.5 W/cm2 on the gold-coated area. The proposed method also allows cyclical...
Microtubule gliding on a kinesin-coated surface may be applied as a nanoactuator to manipulate nanoscale materials in a microfluidic environment. However, controlling the velocity and direction of microtubule gliding has been a major challenge for bioengineering. To develop a novel method of molecular manipulation, we propose a technique to control the velocity of gliding microtubules by light irradiance,...
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