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Which fluorescent dye can be used for red fluorescence?

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Which fluorescent dye can be used for red fluorescence?

(a) Rhodamine

(b) Fluorescein

(c) Carmine

(d) DAPI

I had been asked this question by my college professor while I was bunking the class.

My question comes from Flow Cytometry and Cell Sorting topic in section Cancer Biology & Methods in Cytogenetics of Cytogenetics

1 Answer

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The correct option is (a) Rhodamine

Easiest explanation: The Rhodamine gives red fluorescence while the fluorescein gives a green fluorescence. Carmine is a red dye that is used in food but it’s not used for immunological methods. DAPI stains the nucleus blue.

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