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SDS-PAGE Gel Electrophoresis Forum SDS-PAGE Forum and Gel Electrophoresis Forum. Discuss the running of agarose gels, sds-page gels, and other gels including sequencing, gradient or tricine.


Faint Bands

Faint Bands - SDS-PAGE Gel Electrophoresis Forum

Faint Bands - SDS-PAGE Forum and Gel Electrophoresis Forum. Discuss the running of agarose gels, sds-page gels, and other gels including sequencing, gradient or tricine.


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Old 11-25-2009, 01:47 AM
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Default Faint Bands



When the digested plasmid was run through the gel electrophoresis, the image showed some really faint bands. What causes faint bands?
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Old 05-14-2010, 12:16 PM
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Default Re: Faint Bands

faint band means either:
1. There was insufficient quantity or concentration of DNA loaded on the gel. Increase the amount of DNA, but don't exceed 50 ng/band.
2. The DNA was degraded. Avoid nuclease contamination.
3. The DNA was electrophoresed off the gel. Electrophorese the gel for less time, use a lower voltage, or use a higher percent gel.
4. Improper uv light source was used for visualization of ethidium bromide-stained DNA. Use a shortwavelength (254 nm) W light for greater sensitivity. Note: For preparative gels, using a longer wavelength (312 nm) W light will minimize DNA degradation.
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