Affordable Access

Publisher Website

A Rapidly Maturing Far-Red Derivative of DsRed-Express2 for Whole-Cell Labeling†

Authors
Journal
Biochemistry
0006-2960
Publisher
American Chemical Society
Publication Date
Volume
48
Issue
35
Identifiers
DOI: 10.1021/bi900870u
Keywords
  • Rapid Report
Disciplines
  • Biology

Abstract

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.

There are no comments yet on this publication. Be the first to share your thoughts.