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  • Next-generation enzymes with improved properties derived from in vitro protein evolution
  • Custom functional testing, tailored packaging, and filling to meet your assay requirements and specifications
  • Availability of lyo-ready enzyme formulations without glycerol, for compatibility with lyophilized assays
  • Manufactured in ISO 13485 or ISO 9001 certified facilities–high product quality and lot-to-lot reproducibility

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PCR Enzymes and Reverse Transcriptases

In the development of nucleic acid-based assays, the choice of PCR enzyme is key to success. Our knowledge of and expertise in enzymology and in vitro evolution allows us to develop and offer a broad portfolio of DNA polymerases based on a combination of hot-start technology, speed, level of tolerance to PCR inhibitors, and/or lyophilization compatibility (Table 1).


Table 1. DNA polymerase selection chart.

Characteristics Platinum II Taq Hot-Start DNA Polymerase Platinum Taq DNA Polymerase AmpliTaq Gold DNA Polymerase LibertyTaq DNA
Wild type Taq DNA Polymerase Phire Hot Start II DNA Polymerase
Hot-start PCR Antibody-based Antibody-based Chemically 
Proprietary No  Affibody-based
TaqMan probe–compatible Yes  Yes  Yes  Yes  Yes  No
Reactivation time 2 min 2 min 10 min 0 min 0 min 0 min
Extension rate 15 sec/kb 30–60 sec/kb 30–60 sec/kb 30–60 sec/kb 30–60 sec/kb 10–15 sec/kb
Sensitivity +++ +++ +++ + + +
Specificity +++ +++ +++ + + ++
Inhibitor tolerance +++ + + + + +++
Lyo-ready* On request Yes On request Yes Yes Yes

* Lyo-ready is a lyophilization-compatible enzyme composition without glycerol.
Note: “+” = poor; “++” = medium; “+++” = recommended choice.

With the introduction of Thermo Scientific Phusion High-Fidelity DNA Polymerases in 2003, a new standard of performance was established for high-fidelity PCR for even the most difficult templates. Choose from our collection of high-fidelity enzymes in a variety of formats, buffers, and dNTP solutions, depending on the sophistication of your nucleic acid–based assay and your experimental requirements (Table 2).


  • Highest fidelity on the market (>100x that of Taq polymerase)
  • Exceptional tolerance of common inhibitors of PCR 
  • Shorter cycling times for faster sample-to-results
  • Robust amplification of broad range of targets

Table 2. High-fidelity DNA polymerase selection chart.

Characteristics Platinum SuperFi II DNA Polymerase Phusion Hot Start II High-Fidelity DNA Polymerase Phusion U Hot Start DNA Polymerase Phusion High-Fidelity DNA Polymerase
Fidelity vs. Taq polymerase >300x 52x 25x 52x
Hot-start PCR Antibody-based Affibody-based Affibody-based No
Target length ≤20 kb ≤20 kb ≤20 kb ≤20 kb
Extension rate 15–30 sec/kb 15–30 sec/kb 15–30 sec/kb 15–30 sec/kb
TaqMan probe–compatible No No No No
Inhibitor tolerance ++++ +++ ++ ++
dUTP tolerance No  No Yes No
Multiplexing Yes Yes Yes No
Lyo-ready* On request Yes On request On request

* Lyo-ready is a lyophilization-compatible enzyme composition with low glycerol (<1%).
Note: “++” = medium; “+++” = recommended choice; “++++” = outstanding.

We offer a comprehensive portfolio of RTs, from the wild type Moloney murine leukemia virus (M-MuLV) RT to the Invitrogen SuperScript line of RTs with superior characteristics such as enhanced sensitivity and reduced reaction time (Table 3). Our proprietary in vitro protein evolution technology has enabled the introduction of multiple favorable mutations that dramatically improved enzyme thermostability, resistance to inhibitors, and processivity. Our RT enzymes are also available in lyo-ready formulations, offering additional flexibility for RT-qPCR– based assay development.


  • Robust cDNA synthesis with challenging samples
  • High efficiency and sensitivity, even in the presence of RT inhibitors
  • Enhanced thermostability and processivity
  • Minimal false-positive results with low residual host-cell DNA

Table 3. Reverse transcription selection chart.

Characteristics SuperScript IV RT SuperScript III RT Maxima RT RevertAid RT
Optimal reaction temperature  50˚C 50˚C 50˚C 42˚C
RNase H activity No No Yes Yes
RNase H minus version available NA NA Maxima H Minus RT RevertAid H Minus RT
Reaction time 10 min 50 min 30 min 60 min
Inhibitor resistance ++++ + +++ +
Sensitivity ++++ +++ +++ ++
Lyo-ready* Yes Yes Yes Yes

* Lyo-ready is a lyophilization-compatible enzyme composition without glycerol.
Note: “+” = poor; “++” = medium; “+++” = good; “++++” = recommended choice.

Our dNTPs have been extensively tested and verified for use in a wide variety of molecular biology applications, including highly sensitive techniques such as RT-qPCR and next-generation sequencing (Table 4).


  • Manufactured using dedicated equipment for each dNTP
  • Tested to be free of contaminating RNase or DNase activities and inhibitors of qPCR, PCR, and RT
  • Stable for up to 36 months; dNTP preparations remain stable after >100 freeze/thaw cycles
  • High purity (≥99%) according to HPLC
  • Large-scale manufacturing (>1,000 L) available for individual dNTP solutions or mixes

Table 4. Quality testing is tailored to help ensure high performance of dNTPs in your DNA- and RNA-based assays.

Parameter* Method used
Appearance Clear, colorless solution
pH value 7.3–7.5
Concentration 100 ±3 mM
Base purity (HPLC) >99.5% deoxynucleoside
Purity (HPLC) ≥99% triphosphate
Pyrophosphate <0.003 pmol PPi/pmol dNTP
Endodeoxyribonuclease and nicking activity  Undetectable after incubation of supercoiled plasmid DNA with dNTP
Endo and exodeoxyribonucleases  Undetectable after incubation of radiolabeled, single- and double-stranded oligonucleotides with dNTP
Ribonucleases Undetectable after incubation of RNA transcript with dNTP
Human DNA Undetectable in quantitative PCR test, which uses amplification of Alu repeats inhuman gDNA
E. coli DNA Undetectable in quantitative PCR test, which uses amplification of an E. coli 23S rRNA gene fragment
Functional test Functionally tested in two-step RT-qPCR using different starting amounts of RNA transcript in reverse transcription reactions followed by amplification with hot-start Taq DNA polymerase

* Scope of standard quality-control program may vary for custom products.

PCR thermal cyclers—Rely on Applied Biosystems thermal cyclers, renowned for their dependability, accuracy, and proven performance since 1987. Our thermal cyclers can be customized to fit your platform, including software and private label.

PCR plastics—Take advantage of precision manufacturing with high-grade plastic consumables.

  Download the OEM PCR and qPCR Plastics Guide

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