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  1. No Access

    Chapter

    Site-Directed Mutagenesis of Residues in the Active Site of Sepiapterin Reductase

    Tetrahydrobiopterin (BH4) is the natural cofactor for producing neurotransmitters such as catecholamines, indoleamines, and nitric oxide. Sepiapterin reductase (SPR; EC 1. 1. 1. 153) catalyzes the terminal step i...

    K. Fujimoto, T. Nonaka, M. Sakurai, S. Katoh in Chemistry and Biology of Pteridines and Fo… (2002)

  2. No Access

    Article

    Biochemistry of frog ribonucleases

    Frogs have unique pyrimidine base-specific RNases, with structures similar to those of turtle, iguana and chicken RNases. Among the four frog RNases discussed here, three from Rana pipiens, R. catesbeiana and R....

    M. Irie, K. Nitta, T. Nonaka in Cellular and Molecular Life Sciences CMLS (1998)