# How do you do serial dilution in qPCR?

## How do you do serial dilution in qPCR?

You can start by taking 5 ml of template / DNA extraction and mix with 45 ml sterile water. Mix them thoroughly bu pipetting several times. It’s the 10-1 dilution. Then, take 5 ml of this mixture and add to the second tube containing 45 ml water.

## How do I choose primers for RT PCR?

RT-PCR amplification of a particular RNA sequence requires two PCR primers that are specific for the gene transcript of interest. The primer design should allow differentiation between the amplified product from cDNA and an amplified product derived from contaminating genomic DNA.

How is qPCR primer efficiency calculated?

How to calculate primer efficiencies

2. Calculate the log of each sample dilution.
3. Get the slope of the regression between the log values and the average Ct values.
4. Calculate the primer efficiency by using the slope value.

### How much primer do I need for RT PCR?

We standardly use 1,25 µl of a 6µM primer stock solution for each reaction.

### How do you calculate serial dilutions?

In serial dilutions, you multiply the dilution factors for each step. The dilution factor or the dilution is the initial volume divided by the final volume. For example, if you add a 1 mL sample to 9 mL of diluent to get 10 mL of solution, DF=ViVf = 1mL10mL=110 .

How do you make a 1/10 dilution?

For example, to make a 1:10 dilution of a 1M NaCl solution, you would mix one “part” of the 1M solution with nine “parts” of solvent (probably water), for a total of ten “parts.” Therefore, 1:10 dilution means 1 part + 9 parts of water (or other diluent).

#### How do you determine primer?

Taking into consideration the information above, primers should generally have the following properties:

1. Length of 18-24 bases.
2. 40-60% G/C content.
3. Start and end with 1-2 G/C pairs.
4. Melting temperature (Tm) of 50-60°C.
5. Primer pairs should have a Tm within 5°C of each other.
6. Primer pairs should not have complementary regions.

#### How do I know my primer specificity?

ONE OR MORE PRIMER SEQUENCES

1. Go to the Primer BLAST submission form.
2. Enter one or both primer sequences in the Primer Parameters section of the form.
3. In the Primer Pair Specificity Checking Parameters section, select the appropriate source Organism and the smallest Database that is likely to contain the target sequence.

How is RT PCR efficiency calculated?

Finally, efficiency is calculated using the equation: E = -1+10(-1/slope). Or use this calculator which does the work for you. Be sure to understand what influences the slope of the amplification curve, as it can otherwise be misleading. Typically, desired amplification efficiencies range from 90% to 110%.

## How do you do a dilution series?

To perform a serial dilution, a small amount of a well-mixed solution is transferred into a new container, and additional water or other solvent * is added to dilute the original solution. The diluted sample is then used as the base solution to make an additional dilution.

## How do you calculate PCR product size?

By substracting the lower sequence number value of the forward strand from the lower sequence number value of the reverse strand you can find out the PCR product length.

How do you validate primer?

Validating Primer Design

1. Primers are homologous to the desired target sequence.
2. Appropriate splice variants are detected.
3. SNPs have been avoided unless required for the assay.
4. The oligos and amplicon do not adopt a secondary structure.
5. There is low potential for the oligos of the reaction to hybridize to each other.