Navigation Links
The Fastest, Simplest, and Most Effective Way to Remove DNA Contamination

TURBO DNA-free Kit
Orders of magnitude better DNA removal than with wild type DNase I

Perform DNA digestion and sample clean-up in just 20 minutes

Preserve RNA quality

DNase treatment is the method of choice for the removal of contaminating genomic DNA from RNA samples in preparation for RT-PCR. TURBO DNase (patent pending) is an engineered variant of DNase I with a 6-fold lower Km for DNA than wild type DNase I. As a result, TURBO DNase is a superior enzyme for removal of trace amounts of contaminating DNA from RNA preparations. Using the TURBO DNA-free Kit, DNA digestion and the subsequent removal of DNase and divalent ions from the RNA sample, can be accomplished within 20 minutes.

We compared the TURBO DNA-free Kit with a popular wild type DNase I enzyme (Competitor P). To highlight the benefits of TURBO DNase, total RNA was purified from mouse spleen, a notoriously DNA-rich tissue, using a procedure that results in significant contamination with genomic DNA. An 8 g sample of spleen RNA was then digested for 15 min at 37C with 12 U of TURBO DNase or 12 U of DNase I from Competitor P in a 100 l reaction. Reactions were then processed as instructed by the TURBO DNA-free Kit Instruction Manual o r by the competitors protocol. The treated RNA was subjected to real-time PCR to detect genomic DNA contamination that remained after DNase treatments. A GAPDH primer/probe set was used in triplicate reactions, and the extent of genomic DNA removal was calculated from the real-time PCR cycle threshold (Ct) values.

Elimination of DNA contamination by TURBO DNase, compared to no DNase treatment, shifted the real-time PCR results by >20 Ct values, representing >1.2 million fold reduction of DNA contamination. When compared to standard DNase I treatment, TURBO DNase decreased genomic DNA by an additional 22.6 fold (Figure 1). Indeed, one of the three TURBO DNA-free replicates was negative even after 40 cycles of PCR.

Figure 1. The TURBO DNA-free Kit Removes >20-fold more Genomic DNA than Competing Wild Type DNase I. RNA was isolated from mouse spleen using a procedure that results in significant contamination with genomic DNA. 8 g of the RNA was then treated with either 12 U of TURBO DNase or DNase I from Competitor P in a 100 l reaction. After DNase digestion, samples were processed by following the TURBO DNA-free or the competitors protocol. Triplicate samples of the treated RNA were subjected to real-time PCR using a GAPDH primer/probe set. Note that treatment with TURBO DNase shifted the average Ct threshold 4.5 cycles, equivalent to 22.6 fold reduction of genomic DNA contamination.

By comparison, the wild type DNase I removed 20 times less DNA; GAPDH was detected in all three replicates after 30 cycles. In addition, RNA LabChip analysis of the DNase-treated RNA revealed that TURBO DNA-free was far superior in preserving RNA quality (28S/18S rRNA=1.1) than the competitors method (28S/18S rRNA=0.36). The TURBO DNA-free Kit safeguards RNA quality using reagents that are more potent and much faster and simpler to use than competing products that include wild type DNase I.

Scientific Contributors

Jon Kemppainen, Gary Latham Ambion, Inc.

back to top

Ordering Information
Cat# Product Name Size 1907 TURBO DNA-free 50 rxns


Page: All 1 2 3

Related biology technology :

1. DNA-free A NEW Method to Remove DNA
2. Mycoplasma Contamination Reduces the Effect of Lipid-Mediated Transfection of Mammalian Cells
3. Preventing Carry-over Contamination with Uracil-DNA Glycosylase
4. Combine High Yield, Great Accuracy and the Prevention of Carry-over Contamination by Using the Novel Expand High FidelityPLUS PCR System
5. Combat RNase Contamination in the Lab
6. Testing Compressed Air Lines for Microbiological Contamination
7. Testing Compressed Air Lines for Microbiological Contamination
Post Your Comments:

(Date:11/24/2015)... LUMPUR, Malaysia , Nov. 24, 2015 /PRNewswire/ ... global contract research organisation (CRO) market. The trend ... result in lower margins but higher volume share ... increased capacity and scale, however, margins in the ... Research Organisation (CRO) Market ( ), ...
(Date:11/24/2015)... -- Cepheid (NASDAQ: CPHD ) today announced that ... and invited investors to participate via webcast. ... 1, 2015 at 11.00 a.m. Eastern Time --> ... 1, 2015 at 11.00 a.m. Eastern Time --> ... NY      Tuesday, December 1, 2015 at 11.00 ...
(Date:11/24/2015)... , Nov. 24, 2015 /CNW/ - iCo Therapeutics ("iCo" ... reported financial results for the quarter ended September ... in Canadian dollars and presented under International Financial ... States ," said Andrew Rae , ... regarding iCo-008 are not only value enriching for ...
(Date:11/24/2015)... ... 24, 2015 , ... International Society for Pharmaceutical Engineering (ISPE) ... annual events for pharmaceutical manufacturing: 2015 Annual Meeting. The conference took place in ... largest number of attendees in more than a decade. , “The 2015 ...
Breaking Biology Technology:
(Date:11/2/2015)... , Nov. 2, 2015  SRI International has ... to provide preclinical development services to the National Cancer ... SRI will provide scientific expertise, modern testing and support ... of preclinical pharmacology and toxicology studies to evaluate potential ... --> The PREVENT Cancer Drug Development Program is ...
(Date:10/29/2015)... 29, 2015 Daon, a global leader in ... released a new version of its IdentityX Platform ... North America have already installed IdentityX v4.0 ... a FIDO UAF certified server component as ... activate FIDO features. These customers include some of the ...
(Date:10/29/2015)... NXTD ) ("NXT-ID" or ... the growing mobile commerce market and creator of ... leading marketplace to discover and buy innovative technology ... on StackSocial for this holiday season.   ... a biometric authentication company focused on the growing ...
Breaking Biology News(10 mins):