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JC-1 exists as a monomer at low concentrations and/or low membrane potentials and displays fluorescence ex./em. maxima similar to that of YFP. At higher concentrations and/or higher membrane potentials, JC-1 forms aggregates with a red-shifted emission maxima of 590nm and a broadened excitation spectra. The 49012 longpass filter set will allow detection of JC-1 monomer and aggregate simultaneously.

This dye and the related dye, Di-4-ANEPPS, are most effectively used as ratiometric indicators of membrane potential. Increases in membrane potential are indicated by a decrease in fluorescence intensity with approx. 440nm excitation and an increase in fluorescence intensity with approx. 530nm excitation. Use of this 71006 filter set requires an external filter wheel to house the 2 excitation filters and to facilitate rapid switching of filters for ratiometric measurements.

Contact us for custom filter set recommendations

Calcofluor White is a commonly used stain to detect fungi and yeast and other microorganisms. It is a non-specific stain which preferentially binds to chitin and cellulose in cell walls and as such is also used to visualize plant cells. Calcofluor White has extremely broad excitation/emission spectra, and as a result almost any filter set with UV or violet/blue excitation wavelengths will generate fluorescence emission which may be detected across a very broad range. Some samples will fluoresce strongly in the green wavelengths, others in the blue, and others yellow-orange. Because of this, filter selection is subjective, partly depending on the experience of the microscopist. Our filter sets 11000, 11003, 11005, 11006, 11011 and 11012 may be used successfully depending on the sample and the observer’s preference.

Although the excitation maxima of qdot nanocrystals is in the UV, a broad range of excitation wavelengths may be used.

For imaging applications using a monochrome camera, this longpass filter set will not distinguish FM 4-64 from TRITC or similar orange/red fluorochromes. To be able to distinguish between FM 4-64 and TRITC or Texas Red-like fluorochromes, contact us for a custom filter set.

Contact us for custom filter set recommendations