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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....
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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...