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  • Title: Cloning and nucleotide sequences of the mdh and sucD genes from Thermus aquaticus B.
    Author: Nicholls DJ, Sundaram TK, Atkinson T, Minton NP.
    Journal: FEMS Microbiol Lett; 1990 Jun 15; 58(1):7-14. PubMed ID: 2204576.
    Abstract:
    A 3 kb DNA fragment containing the gene (mdh) encoding malate dehydrogenase (MDH) from the thermophile Thermus aquaticus B was cloned in Escherichia coli and its nucleotide sequence determined. Comparative analysis showed the nucleotide sequence to be very closely related to that determined for the Thermus flavus mdh gene and flanking regions, with no differences between the predicted amino acid sequences of the MDHs. A proximal open reading frame, identified as the sucD gene, and the mdh gene may be parts of the same operon in T. aquaticus B. Expression of the T. aquaticus B mdh gene in E. coli was found to be at a relatively low level. A simple method for purification of thermostable MDH from the E. coli clone containing the T. aquaticus B mdh gene is presented.
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