Takara Bio Inc.

Takara Shuzo Co., Inc.

Yoshimi Sato

Ikunoshin Kato

Takashi Uemori

Hiroyuki Mukai

Kiyozo Asada

Kazue Miyake

Tomoko Fujita

Osamu Takeda

Shigekazu Hokazono

Kazue Nishiwaki

Nana Shimada

Hiroaki Sagawa

Nobuto Koyama

Eiji Kobayashi

Hikaru Takakura

Michio Hagiya

Hiroshi Kobori

Ryo Hirano

Yuji Hashimoto

Tatsuji Enoki

Jun Tomono

Junko Yamamoto

Kikyozo Asada

Yuki Ueda

Mariko Moriyama

Haruhisa Sawaragi

Mariko Okawa

A DNA synthesis reaction-enhancer comprising at least one kind selected from the group consisting of acidic substances and cationic complexes; a DNA synthesis method in which during a DNA synthesis reaction a reaction is carried out in the presence of the above enhancer by using DNA polymerase; a DNA synthesis reaction composition comprising the above enhancer; a DNA synthesis reaction composition comprising two or more kinds of DNA polymerases each having 3'&#x2192;5&#x2032; exonuclease activity; a DNA synthesis method in which during a DNA synthesis reaction two or more kinds of DNA polymerases each having 3&#x2032;&#x2192;5&#x2032; exonuclease activity are used; a kit for use in in vitro DNA synthesis, comprising two or more kinds of DNA polymerases each having 3&#x2032;&#x2192;5&#x2032; exonuclease activity; and a kit for use in in vitro DNA synthesis, wherein the kit comprises the DNA synthesis reaction-enhancer and DNA polymerase. According to the present invention, DNA synthesis can be carried out at an efficiency more excellent as compared to conventional DNA synthesis reaction.

Method for synthesizing DNA

A polypeptide having a high fidelity DNA polymerase activity and thus being useful as a genetic engineering reagent; a gene encoding this polypeptide; a method of producing the polypeptide; and a method of amplifying a nucleic acid by using the polypeptide.

Polypeptides having DNA polymerase activity

Polypeptides having an RNase H activity highly useful in genetic engineering; genes encoding these polypeptides; and a process for genetic engineeringly producing these polypeptides.

Thermotolerant ribonuclease H

A polymerase activity is effectively enhanced by adding an anionic surfactant, in particular an anionic surfactant having a polyethoxyl group, to a reaction mixture containing a polymerase.

Method for enhancing polymerase activity

A convenient and effective method for amplifying a nucleic acid sequence characterized by effecting a DNA synthesis reaction in the presence of chimeric oligonucleotide primers; a method for supplying a large amount of DNA amplification fragments; an effective method for amplifying a nucleic acid sequence by combining the above method with another nucleic acid sequence amplification method; a method for detecting a nucleic acid sequence for detecting or quantitating a microorganism such as a virus, a bacterium, a fungus or a yeast; and a method for detecting a DNA amplification fragment obtained by the above method in situ.

Method for amplifying nucleic acid sequence

A DNA synthesis method with a shortened time period required for DNA synthesis by polymerase chain reaction (PCR), characterized in that a DNA polymerase is used in an amount effective for providing more than 10 ng of amplified DNA fragments of about 2 kb per 50 &mgr;l of a reaction mixture, when PCR is carried out under the following conditions (A) and (B): (A) reaction mixture: 50 &mgr;l volume of a reaction mixture comprising DNA polymerase, 1 ng of genomic DNA from and 10 pmol each of primers Eco-1 and Eco-2 (nucleotide sequences of the primers Eco-1 and Eco-2 being shown in SEQ ID NOs: 10 and 11 of Sequence Listing, respectively); and having a composition suitable for the DNA polymerase; and (B) reaction conditions: 35 cycles of PCR, wherein one cycle consists of 99&deg; C., 1 second-66&deg; C., 7 seconds; a kit for DNA synthesis usable for the DNA synthesis method; and an article of manufacture of a PCR agent. According to the present invention, the procedures in the genetic engineering studies and industries involved with PCR can be speeded up.

The present invention relates to a thermostable DNA polymerase-associated factor capable of enhancing DNA synthesizing-activity of a DNA polymerase; a thermostable DNA polymerase-associated factor possessing an activity of binding to a DNA polymerase and a method for producing the same; a gene encoding the DNA polymerase-associated factor; a method of DNA synthesis by using a DNA polymerase in the presence of the DNA polymerase-associated factor; and a kit comprising the DNA polymerase-associated factor. According to the present invention, there can be provided in vitro DNA synthesis and a DNA amplification system which are more excellent than conventional techniques by utilizing the DNA polymerase-associated factor of the present invention.

DNA polymerase-related factors

Growing community of inventors

Shiga, Japan

Yoshimi Sato