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cDNA Synthesis Kit


  • Highly efficient synthesis of long cDNAs (≥ 19 kb)
  • Excellent yields at temperatures up to 55°C
  • High sensitivity reverse transcription from low abundance template
  • Superior performance in demanding applications, including templates with a high degree of secondary structure


  • First-strand cDNA synthesis for RT-PCR and qPCR
  • Gene expression profiling
  • RNA labeling and primer extension
  • cDNA library construction

Purchase cDNA Synthesis Kit

Availability: In stock Bulk requests please inquire at

Catalog # Size Package Content Price* Qty
BR0400401 10 reactions of 20 µl 10 µl Reverse Transcriptase
100 µl 5X Reverse Transcriptase Buffer
25 µl dNTP Master Mix, 5 µl RNase Inhibitor
10 µl Hexamer and 5 µl Oligo (dT) Primer
1.5 ml PCR Grade Water
BR0400403 125 reactions of 20 µl 125 µl Reverse Transcriptase
1 ml 5X Reverse Transcriptase Buffer
250 µl dNTP Master Mix, 62.5 µl RNase Inhibitor
125 µl Hexamer and 62.5 µl Oligo (dT) Primer
5 × 1.5 ml PCR Grade Water
BR0400404 250 reactions of 20 µl 2 kits BR0400403 cDNA Synthesis Kit (125 rxn each)

*Does not include applicable tax, shipping & handling, or other charges.


biotechrabbit™ cDNA Synthesis Kit provides superior components that ensure efficient first-strand cDNA synthesis from mRNA or total RNA templates. biotechrabbit RevertUP™ II Reverse Transcriptase enables highly efficient reverse transcription with increased thermostability.

biotechrabbit RNase Inhibitor is a potent non-competitive inhibitor of RNases. The combination of highly efficient cDNA synthesis, effective RNase inhibition and pure dNTPs allows high yields of cDNAs of more than 19 kb.

For greater application flexibility, hexamer primers, allowing all RNAs in the reaction to be used as templates, and an oligo (dT) primer, for the synthesis of cDNA from only poly(A) tailed mRNA, are included.





RevertUP II Reverse Transcriptase

RevertUP II Reverse Transcriptase, 200 U/µl in Storage buffer, containing 50% glycerol

5× cDNA Synthesis Buffer

Optimized 5× cDNA synthesis buffer

dNTP Mix (10 mM each)

Aqueous solution (pH 7.0) containing 10 mM each: dATP, dCTP, dGTP, dTTP sodium salts

RNase Inhibitor

RNase Inhibitor, 40 U/µl, in Storage buffer, containing 50% glycerol

Hexamer Primer

25 µM Random Hexamer Primer

Oligo (dT) Primer

10 µM Oligo (dT) Primer

PCR Grade Water

Ultrapure, sterile filtrated water, DNase-, RNase- and protease-free



-20°C (until expiry date – see product label)



Quality Control
Functional Assay

cDNA synthesis with specific primers, followed by quantitative PCR.


Prevention of cDNA synthesis reaction contamination

RNase contamination is an exceptional concern when working with RNA. RNase A, providing most threat to RNA integrity, is a highly stable contaminant of any laboratory. To prevent RNA from degradation and to minimize possibility of contamination during cDNA synthesis; follow the guidelines below:

  • Use separate clean areas for preparation of the samples and the reaction mixture.
  • DEPC-treat all tubes and pipette tips or use certified nuclease-free labware with aerosol filters.
  • Wear fresh gloves when handling RNA and all reagents.
  • Always assess the integrity of RNA prior to cDNA synthesis in denaturing agarose gel electrophoresis.
  • Use RNase free water and other reagents.
  • To prevent RNA from degradation, add Ribonuclease inhibitor (optional) in to the cDNA synthesis reaction (20 units for 20 µl reaction).
Typical cDNA synthesis reaction set up
  • Thaw on ice and mix very well all reagents.
  • Assemble and keep all reactions on ice.
  • To use time and reagents effectively, always prepare master mix for multiple reactions. For a master mix volume, always calculate the number reactions that you need plus one additional.
  • Combine the following in an RNase-free reaction tube: 



Final concentration

dNTP Mix (10 mM each)

2 µl

1 mM (each dNTP)

RNase Inhibitor, 40 U/µl (optional)

0.5 µl

1 U/µl

Oligo (dT)12–18 (10 µM) – or

Hexamer Primer (25 µM) – or

Gene Specific Primer (10 µM)

0.5 µl

1 µl

0.5 µl

0.25 µM

1.25 µM

0.25 µM

5× cDNA Synthesis Buffer

4 µl

RNA Template

0.1–1 µg total RNA or

50–500 ng mRNA (polyA)


RevertUP™ II Reverse Transcriptase

1 µl

10 U/µl

PCR Grade Water



Total volume

20 µl


  • Mix and collect the drops by centrifuging briefly.
  • When using
    • Hexamer Primer, incubate 10 minutes at 30°C followed by 50–55°C for 20–60 minutes
    • Oligo (dT) or gene-specific Primer incubate at 50–55°C for 20–60 minutes.
  • Inactivate enzyme at 99°C for 5 minutes.
  • Collect the drops by spinning briefly.
  • Store products at –20°C or proceed to next step, like PCR or qPCR.
  • Use maximum 10 µl of the cDNA synthesis reaction mix for PCR in 50 µl volume.


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