I am working on both mouse and human samples for gene expression studies. Do you have one endogenous control that I can use with both species?
The 18S rRNA is highly conserved among eukaryotes. We have several configurations of assays for this gene: P/N 4331182, Assay ID: Hs99999901_s1; PN 4319413E, 4310893E, 4333760T, 4333760F, 4308329. You can use any of these for both human and mouse samples, as well as samples from any other eukaryotic species.
Are there any TaqMan Pre-Developed Assay Reagents (PDARs) that have not been made obsolete?
The PDARs for several genes were simply renamed as the TaqMan Endogenous Controls and are available in the different tube sizes in FAM/MGB and VIC/MGB dye and quencher combinations. Those genes are: 18S rRNA; GAPDH; ACTB; TBP; PGK1; GUSB; PPIA; B2M; RPLP0; and TFRC.
Will TaqMan Gene Expression Assays work similarly to PDARs?
The TaqMan Gene Expression Assays that were created as replacements for the PDARs were designed with exactly the same sequence as the PDAR. Additionally, the assays are formulated with the same primer and probe concentration in a 20X solution and are available in 250 reaction size. There is virtually no difference between the PDAR and its replacement assay.
I am trying to recreate a gene expression experiment that used the discontinued PDAR (Pre-Developed Assay Reagents) products. Can I find a TaqMan Gene Expression Assay with the same sequence?
Yes, we have maintained a TaqMan Gene Expression Assay ID for each PDAR that was available in the past. This assay uses the exact same sequence as the PDAR, and is denoted by a series of five 9's in the assay ID (example: Hs99999070_m1 is the old PDAR for the gene VEGF).
What can I use as an alternative to TaqMan Pre-Developed Assay Reagents (PDARs)?
The TaqMan Gene Expression Assays are the improved alternative for the PDARs. With over 400,000 pre-designed assays for human, mouse, and rat designed over most exon-exon junctions of transcripts in the public RefSeq database, chances are good that you will find the right assay for your experiment. Many assays are available for each gene because assays are designed for each transcript. Therefore, TaqMan Gene Expression Assays will enable you to detect different expression levels for splice variants of genes.