Sobre o exercício da advocacia por juízes leigos dos juizados especiais : para uma superação do conflito aparente de normas entre a Lei n. 8.906/94 e a Lei n. 9.099/95

Inclui notas explicativas e bibliográficas

Considerações acerca da constitucionalidade na expedição de medidas provisórias versando materia orçamentaria pública (nota técnica n. 1/95) / Robison Gonçalves de Castro. --

Bibliografia.

Convenção Sobre Diversidade Biológica e Projeto de Lei do Senado n. 306/95 : soberania, propriedade e acesso aos recursos energéticos

Analisa o projeto de lei n. 306/95

Covalent intermediate trapped in 2-keto-3-deoxy-6- phosphogluconate (KDPG) aldolase structure at 1.95-Å resolution

2-Keto-3-deoxy-6-phosphogluconate (KDPG) aldolase catalyzes the reversible cleavage of KDPG to pyruvate and glyceraldehyde-3-phosphate. The enzyme is a class I aldolase whose reaction mechanism involves formation of Schiff base intermediates between Lys-133 and a keto substrate. A covalent adduct was trapped by flash freezing KDPG aldolase crystals soaked with 10 mM pyruvate in acidic conditions at pH 4.6. Structure determination to 1.95-Å resolution showed that pyruvate had undergone nucleophilic attack with Lys-133, forming a protonated carbinolamine intermediate, a functional Schiff base precursor, which was stabilized by hydrogen bonding with active site residues. Carbinolamine interaction with Glu-45 indicates general base catalysis of several rate steps. Stereospecific addition is ensured by aromatic interaction of Phe-135 with the pyruvate methyl group. In the native structure, Lys-133 donates all of its hydrogen bonds, indicating the presence of an ɛ-ammonium salt group. Nucleophilic activation is postulated to occur by proton transfer in the monoprotonated zwitterionic pair (Glu-45/Lys-133). Formation of the zwitterionic pair requires prior side chain rearrangement by protonated Lys-133 to displace a water molecule, hydrogen bonded to the zwitterionic residues.