DIRECT OBSERVATION OF KINESIN STEPPING BY OPTICAL TRAPPING INTERFEROMETRY
DIRECT OBSERVATION OF KINESIN STEPPING BY OPTICAL TRAPPING INTERFEROMETRY
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DOI:
10.1038/365721a0
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发表时间:
1993-10-21
期刊:
影响因子:
64.8
通讯作者:
BLOCK, SM
中科院分区:
文献类型:
--
作者:
SVOBODA, K;SCHMIDT, CF;BLOCK, SM
Do biological motors move with regular steps? To address this question, we constructed instrumentation with the spatial and temporal sensitivity to resolve movement on a molecular scale. We deposited silica beads carrying single molecules of the motor protein kinesin on microtubules using optical tweezers and analysed their motion under controlled loads by interferometry. We find that kinesin moves with 8-nm steps.