Design and synthesis of substrates for model ribosomal reactions.

2'/3'-O-[Bz(NO(2))-Orn(Boc)]-5'-O-Piv-Ado (1) and its deoxy analog: 3'-O-[Bz(NO(2))-Orn(Boc)]-5'-O-Piv-2'-dAdo (2) were designed and synthesized as substrates for the model ribosome reaction we used to demonstrate the crucial role of A76 2'-OH of peptidyl-tRNA in the rate acceleration of peptide bond formation during protein biosynthesis.

[Histochemical evidence of the aminotransferases. V. Quantitative histochemical investigations of the aminotransferases in organs of the rat (author's transl)].

The quantitative histochemical method was employed the activity of some aminotransferases in the rat organs. Determination was based on extraction of the enzymatic reaction product formazan with alkaline dimethylsulfoxid. Evaluation of the enzymatic activity was given by the formazan quantity related to 1 mug tissue protein.