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High‐content proteomics: Fluorescence multiplexing using an integrated, high‐sensitivity, multiwavelength charge‐coupled device imaging system
Author(s) -
Lopez Mary F.,
Mikulskis Alvydas,
Golenko Eva,
Herick Klaus,
Spibey Carole A.,
Taylor Ian,
Bobrow Mark,
Jackson Peter
Publication year - 2003
Publication title -
proteomics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.26
H-Index - 167
eISSN - 1615-9861
pISSN - 1615-9853
DOI - 10.1002/pmic.200300429
Subject(s) - multiplexing , fluorescence , dynamic range , instrumentation (computer programming) , proteomics , quantitative proteomics , sensitivity (control systems) , excitation wavelength , flexibility (engineering) , chemistry , materials science , computer science , optics , biochemistry , physics , electronic engineering , engineering , telecommunications , statistics , mathematics , computer vision , gene , operating system
The detection of proteins in 2‐D gels and their subsequent identification by MS is still the “gold standard” in proteomics. Fluorescent detection has increasingly replaced colorimetric and radiometric detection on gels and blots. The reasons for this are multiple and varied and include higher sensitivity, better quantitation, increased dynamic range, speed, safety and ease of use. Unlike other methods, fluorescent protein detection is also typically very consistent in response from protein to protein and in many cases is compatible with MS methods for protein identification. The superior sensitivity and benefits achieved by fluorescent techniques have spurred the development of instrumentation capable of delivering precise, sensitive, high‐resolution image acquisition over a wide variety of excitation and emission wavelengths. This report focuses on applications using the highly sensitive, charge‐coupled device based ProXPRESS™ multilabel imager, readily configurable for image acquisition over a wide variety of wavelengths (380–700 nm and ultraviolet (UV)) using xenon lamp or UV excitation. The ability to simultaneously detect enzyme activities or protein modifications with different color fluorescent probes in addition to total protein amounts (multiplexing) allows the further mining of proteomic data content from a single set of protein samples. To this end, the development of instrumentation that enables a multiplexing strategy will become central to in‐depth proteomic studies. The ProXPRESS maximizes the efficiency of experimental strategies that require flexibility and multicolor fluorescence detection.