RESOLFT技术图解

来自专栏这只竹鼠忧郁了,我们照一照它的脑子

J. Am. Chem. Soc., 2007, 129 (51), pp 16132–16141

RESOLFT技术是荧光显微术的一条分支。

如图,光开关荧光分子(e.g. Dronpa*)刚开始处于荧光亮态,在此之上加上一个环形光(e.g. 488nm),使中心部分外围的荧光分子处于非荧光态,则剩余荧光态分子在衍射极限以下,对其成像即可实现超分辨。在此之后,加上reset光束(e.g. 405nm),大家都回到荧光态。平移、重复以上过程,可实现更大范围的超分辨。

*Dronpa is a reversibly switchable photoactivatable fluorescent protein . Dronpa gets switched off by strong illumination with 488 nm (blue) light and this can be reversed by weak 405 nm UV light. A single dronpa molecule can be switched on and off over 100 times. It has an excitation peak at 503 nm and an emission peak at 518 nm.

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