A rapidly maturing far-red derivative of DsRed-Express2 for whole-cell labeling.

A rapidly maturing far-red derivative of DsRed-Express2 for whole-cell labeling.
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DOI:
10.1021/bi900870u
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发表时间:
2009-09-08
期刊:
影响因子:
2.9
通讯作者:
Glick, Benjamin S.
Glick, Benjamin S.
中科院分区:
生物学3区
文献类型:
--
作者:
Strack, Rita L.;Hein, Birka;Bhattacharyya, Dibyendu;Hell, Stefan W.;Keenan, Robert J.;Glick, Benjamin S.

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Fluorescent proteins (FPs) with far-red excitation and emission are desirable for multicolor labeling and live-animal imaging. We describe E2-Crimson, a far-red derivative of the tetrameric FP DsRed-Express2. Unlike other far-red FPs, E2-Crimson is noncytotoxic in bacterial and mammalian cells. E2-Crimson is brighter than other far-red FPs and matures substantially faster than other red and far-red FPs. Approximately 40% of the E2-Crimson fluorescence signal is remarkably photostable. With an excitation maximum at 611 nm, E2-Crimson is the first FP that is efficiently excited with standard far-red lasers. We show that E2-Crimson has unique applications for flow cytometry and stimulated emission depletion (STED) microscopy.
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