Spiess, E Two-photon excitation and emission spectra of the green fluorescent protein variants ECFP, EGFP and EYFP. [electronic resource] - Journal of microscopy Mar 2005 - 200-4 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 0022-2720 Standard No.: 10.1111/j.1365-2818.2005.01437.x doi Subjects--Topical Terms: Cell Line, TumorGreen Fluorescent Proteins--chemistryHumansHydrogen-Ion ConcentrationSpectrometry, FluorescenceSpectrophotometry--methods