Assembly Reaction

Can I store the assembled products?

Yes, you can store them at 4℃ for a few days. For further long-term storage, add final 5 mM EDTA before storage at -20℃. The following OriCiro Amp Kit tolerates up to final 0.5 mM EDTA.

Do I need purification of the assembly products before the OriCiro amplification?

No. Add the assembly reaction (1 µl) directly into OriCiro Amp mixture (total 10 µl). OriCiro Amp selectively amplify circular DNA generated even slightly in the assembly reaction. The assembly intermediates (linear forms) are not amplified.

Can I use DNA fragments digested by restriction enzyme or CRISPR-Cas9?


No assembled products is observed

In certain conditions, the assembled product quantity may not be large enough to be observed after assembly reaction. It is highly recommended to perform following amplification reaction

Amplification Reaction

Can I store the amplified products?

Yes, You can store them at 4℃ for a few days. For further long-term storage, add final 20 mM EDTA before storage at -20℃.

How can I analyze the amplified products by electrophoresis?

Dilute the 0.5 µl of products with 5 µl of Loading Buffer (25 mM Tris-HCl pH8.0, 25 mM EDTA, 0.1% SDS, 5% glycerol, 0.1% bromophenol blue), followed by agarose gel electrophoresis. The supercoiled products will be observed.

Extra bands are observed in agarose gel electrophoresis.

In case of DNA contamination.

Put negative control sample (reaction without DNA) for the amplification reaction. OriCiro Amp Kit amplifies DNA even from a single contamination molecule. To identify and remove DNA contamination, monoclonal amplification from a single DNA molecule following limiting dilution is useful.

In case of Concatemer DNA

When the amplified DNA size is less than 4 kbp, extra bands by concatemer DNA may appear. The situation may improve by shortening the reaction time.

No amplified products is observed

Please check the DNA size is less than 100 kbp. If the target DNA size exceeds 100 kbp, the amplification requires a different protocol than described in this manual.

Other possibility is the assembly reaction will be inhibited when salt and/or EDTA concentration of the DNA sample is too high.


- Increase the amplification reaction temperature up to 37℃.

- Increase the amplification reaction time up to 18 hours.

- Increase the template DNA amount added into the amplification reaction.

- Pre-incubate the amplification reaction mixture at 30℃ for 15 minutes just before adding the template DNA.

Can I reamplify the amplified products with OriCiro Amp Kit?


Dilute the amplified products (~10-6), prepare new amplification reaction mixture and incubate again. We checked the amplified products can reamplify continuously more than 10 times.

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Technical inquiry

OriCiro Genomics, Inc.
 318 South Clinical Research Bldg. 7-3-1, Hongo, Bunkyo, Tokyo 113-8485, Japan
TEL : +81(0)3-3868-3610 

URL: https://oriciro.com/ 

e-mail : product@oriciro.com