Article
Dihydrofolate reductase gene polymorphisms in Pneumocystis carinii f. sp. hominis in Japan.
Journal of medical microbiology - 1 Jun 2002
Takahashi Takashi, Endo Tokiomi, Nakamura Tetsuya, Sakashita Hiroyuki, Kimura Kyoko, Ohnishi Kenji, Kitamura Yoshihiro, Iwamoto Aikichi
Abstract excerpt
This study examined polymorphisms in the dihydrofolate reductase (DHFR) gene of Pneumocystis carinii isolates from 27 patients with P. carinii pneumonia (PCP) in Japan. Four substitution sites with two synonymous and two non-synonymous changes were found. Two synonymous substitutions at nucleotide positions 540 and 312 were identified in one and 13 patients, respectively. Two amino acid substitutions (Ala67Val,...
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