What is the agarose gel electrophoresis strips appearing as a blob of fluorescence
The presence of a fluorescent blob in agarose gel electrophoresis strips is ethidium bromide. Ethidium bromide is a highly sensitive fluorescent stain used to visualize DNA in agarose and polyacrylamide gels.Ethidium bromide is excited with a standard 302 nm UV transilluminator and emits an orange-red signal, which can be captured on Polaroid negatives or gel imaging processing systems with CCD imaging heads.