What is a Delta-Delta CT Method?
This is to essentially normalise the gene of interest to a gene which is not affected by your experiment, hence the housekeeping gene-term. To use the delta-delta Ct method, you require Ct values for your gene of interest and your housekeeping gene for both the treated and untreated samples.
Where is the 2 ct method used?
3 Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas 77230, USA. Background: The 2 -??CT method has been extensively used as a relative quantification strategy for quantitative real-time polymerase chain reaction (qPCR) data analysis.
Is Delta-Delta CT the same as Pfaffl equation?
Many thanks for your message. The delta-delta Ct method assumes your primer efficiencies between your target gene and housekeeping gene are the same (or roughtly the same). However, what would be even better in your case is to use the Pfaffl equation to account for the slight differences in primer efficiencies.
What if cDNA dilution versus Delta CT is close to zero?
If the plot of cDNA dilution versus delta Ct is close to zero, it implies that the efficiencies of the target and housekeeping genes are very similar. If a housekeeping gene cannot be found whose amplification efficiency is similar to the target, then the standard curve method is preferred.