期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 102, 期 34, 页码 11963-11967出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0505481102
关键词
biological motors; Chlamydomonas; phototaxis; microfluidics; microspheres
资金
- NIGMS NIH HHS [R01 GM065364, GM 065364, F32 GM067445, GM 067445] Funding Source: Medline
It is difficult to harness the power generated by biological motors to carry out mechanical work in systems outside the cell. Efforts to capture the mechanical energy of nanomotors ex vivo require in vitro reconstitution of motor proteins and, often, protein engineering. This study presents a method for harnessing the power produced by biological motors that uses intact cells. The unicellular, biflagellated algae Chlamydomonas reinhardtii serve as microoxen. This method uses surface chemistry to attach loads (1- to 6-mu m-diameter polystyrene beads) to cells, phototaxis to steer swimming cells, and photochemistry to release loads. These motile microorganisms can transport microscale loads (3-mu m-diameter beads) at velocities of approximate to 100-200 mu m center dot sec(-1) and over distances as large as 20 cm.
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