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Instruction manual Blunting high 0810 F0990K Blunting high
[1] Introduction
[2] Components
[3] Protocol
[4] Troubleshooting
[5] References
CAUTION All reagents in this kit are intended for research purposes. Do not use for diagnosis or clinical purposes. Please observe general laboratory precautions and follow safety guidelines while using this kit. JAPAN
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Blunting high is a kit that produces a blunt end at the DNA terminus, and allows for its
use in a subsequent ligation step using KOD DNA polymerase1) and DNA ligase reagents, respectively.
5’ over hang over han ed 5’-N-N- 5’-N-N-N 3’-N-N- 3’-N-N-N olymerase 3’ over hang over han ed 5’-N-N- 5’-N-N-N 3’-N-N- 3’-N-N-N Fig. 1. Principle of Blunting by KOD DNA polymerase
- The blunting step makes use of KOD DNA polymerase that exhibits 5’J 3’ polymerase
- The blunting step is completed in 2 min.
- A highly efficient premixed ligation reagent, “Ligation high” is included in this kit.
- A control reaction can be performed using the control DNA provided.
This kit includes the following components for 20 reactions. All reagents should be
Notes: - Ligation high is a highly efficient premixed ligation reagent
- The control DNA is pUC18 plasmid digested by EcoRI and Sph I. Following blunting
and subsequent ligation, the circular control plasmid DNA generates E. coli colonies on
- 10 x Blunting Buffer contains 1.2 M Tris-HCl (pH 8.0 at 25 °C), 100 mM KCl, 15 mM
MgCl2, 60 mM (NH4)2SO4, 2 mM dNTPs, 1% TritonX-100, and 0.01% BSA.
TOYOBO CO., LTD. TOYOBO Bio-Technology, CO., LTD. Tel(81)-6-6348-3888 Tel(86)-21-58794900.4140 www.toyobo.co.jp/e/bio
FOR RESEARCH USE ONLY. NOT FOR HUMAN OR DIAGNOSTIC USE. www.toyobo.co.jp/e/bio 1. Blunting Control reaction
* KOD (2.5 U/μl) should be added last. This enzyme exhibits strong 3’ J5’
exonuclease activity in the absence of dNTPs.
For this kit, DNA should be dissolved in distilled water or TE buffer (10 mM
Tris-HCl, pH 8.0, 1 mM EDTA). However, in the following cases, DNA solutions may be used undiluted, directly with this kit.
- Restriction enzyme-treated DNA
Restriction enzyme-treated solutions using High, Medium, Low or Tris-Acetate
buffer can be directly used according to the above protocol.
- PCR products of Taq DNA polymerase
PCR solution (amplified by Taq-based polymerase)
*10 x Blunting Buffer should not be added.
*If the concentration of dNTPs in the PCR solution is less than 0.2 mM, add
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FOR RESEARCH USE ONLY. NOT FOR HUMAN OR DIAGNOSTIC USE. www.toyobo.co.jp/e/bio
This kit can process 10 pmol blunt DNA per reaction. 10 μg pUC18 (linearized;
2.7 kb) corresponds to 10 pmol. The maximum volume of DNA solution is 8 μl.
When preparing the reaction solution, KOD (2.5 U/μl) should be added last. KOD
DNA polymerase exhibits strong 3’ J5’ exonuclease activity in the absence of
The reaction is completed within 2 min. The reaction time can be prolonged up to
2. Ligation Control reaction
Blunted Control DNA (from [3] 1. Blunting)*
- The reacted solution can be directly used for transfection experiments using E.
- For the control experiment, E. coli colonies can be observed on ampicillin plates.
The colony number in the control experiment using the blunted control DNA will
be at least 20 times greater than that using the not blunt control DNA.
- KOD DNA polymerase should not be inactivated prior to the ligation step because
this polymerase is hardly active at 16 °C.
- The reacted solution from the blunting reaction can be used directly in a ligation
reaction, but excessive carry-over of the solution reduces ligation efficiency. In
such cases, prolong the reaction time up to overnight, or purify the blunted
TOYOBO CO., LTD. TOYOBO Bio-Technology, CO., LTD. Tel(81)-6-6348-3888 Tel(86)-21-58794900.4140 www.toyobo.co.jp/e/bio
FOR RESEARCH USE ONLY. NOT FOR HUMAN OR DIAGNOSTIC USE. www.toyobo.co.jp/e/bio Solution
Addition of too much reacted mixture from the
blunting reaction to the ligation reaction tends to
Decrease the volume of the reacted mixture from
the blunting reaction or exchange the buffer of the
reacted mixture obtained from the blunting reaction
to a low salt solution (e.g. distilled water or TE
KOD DNA polymerase degrades DNA from the 3’
end by its 3’J5’ exonuclease activity in the
absence of dNTPs. KOD DNA polymerase must be added last.
1) Takagi M, Nishioka M, Kakihara H, Kitabayashi M, Inoue H, Kawakami B, Oka M,
and Imanaka T., Appl Environ Microbiol., 63: 4504-10 (1997)
TOYOBO CO., LTD. TOYOBO Bio-Technology, CO., LTD. Tel(81)-6-6348-3888 Tel(86)-21-58794900.4140 www.toyobo.co.jp/e/bio
FOR RESEARCH USE ONLY. NOT FOR HUMAN OR DIAGNOSTIC USE.
Eastgate Pediatric Center, Cincinnati, OH An Open Letter to Pediatricians Regarding Medical Issues Involved in International Adoption As an adoptive parent of three daughters born in China, I have traveled to this great nation several times. During all three of my adop-tion trips, I saw China and its medical system through the eyes of a mother as well as those of a pediatrician. I have visite
Synchrony of rest tremor in multiple limbs in Parkinson’s disease: evidence for multiple oscillators H. Ben-Pazi 1,3 , H. Bergman 2,4 , J. A. Goldberg 2,4 , N. Giladi 1 , D. Hansel 4,5 , A. Reches 3 , and E. S. Simon 1 1 Department of Neurology, Tel-Aviv Sourasky Medical Center, Tel-Aviv,3 Department of Neurology, Hebrew University Faculty of Medicine, Jerusalem, and4 Interdisci
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