How can nonspecific binding be reduced in PCR?

Use fewer cycles when template concentration is high, and use more cycles when template concentration is low. 2. Extension time was too long: Excessive extension time can allow nonspecific amplification. Generally, use an extension time of 1 min/kb.

What causes nonspecific bands in PCR?

The quality and concentration of dNTP are closely related to the PCR amplification efficiency. When concentration is too high, it can cause nonspecific bands. In addition, dNTP can be combined with Mg2+ to reduce the free Mg2+ concentration.

How can I improve my PCR band?

Popular Answers (1)

1. Increase the number of amplification cycles.
2. Increase template concentration.
3. Try a different polymerase.
4. Try dNTPs of a different origin (dUTP arising from deamination of dGTP inhibits amplification by proofreading polymerases)
5. Optimize dNTP and Mg2+ concentration.
6. Redesign the primers.

What causes non-specific amplification in PCR?

Non-specific binding of primers frequently occurs and may occur for several reasons. These include repeat sequences in the DNA template, non-specific binding between primer and template, high or low G-C content in the template, or incomplete primer binding, leaving the 5′ end of the primer unattached to the template.

What are nonspecific bands?

Artifact or Nonspecific Bands: Artifact or non-specific bands are bands that do not correlate to the expected mutant, transgene, or wild type bands. They are the results of primers annealing non-specifically. The presence of such bands can be disconcerting.

How do you reduce non-specific bands in Western blot?

5 Tips for Reducing Non-specific Signal on Western Blots

1. Optimize your antibody concentration. Adding too much antibody can cause blots with high background and non-specific bands.
2. Be sure to block.
3. Choose the best membrane for your application and handle with care.
4. Wash well.
5. Take care during detection.

How do you avoid primer dimers in PCR?

i suggest one (or more) of the following solutions:

1. increase the annealing temperature.
2. increase time\ temperature of template denaturation.
3. decrease primers concentration(10 pmol will be OK)
4. use a PCR enhancer such as DMSO.
5. Check out your template.
6. use high quality Tag.

How do you reduce nonspecific binding?

Common strategies include: Adjusting the pH of your buffer. Using protein blocking additives. Adding non-ionic surfactants….

1. Adjust the pH of your buffer.
2. Use Buffer Additives – Protein Blocker.
3. Add Surfactants – Tween 20.
4. Increase salt concentration (NaCl)

How does DMSO work in PCR?

DMSO binds to the DNA and prevents the reannealing of single-stranded DNA. It also facilitates the annealing of primer with a templet. Therefore, it increases the specificity and yield of the PCR reaction. Generally, the GC content of the template DNA for PCR is between 45\% to 52\%.