2. Ermacora N CA C N C N C 0

4. Residue name Atomos: 27 parametros (9 atomos) Ángulos torsionales: 6 parámetros

5. Ermacora

11. izq der poliprolina II phi psi

14. Representación y=F(z) z j = j z 0 + d z x j = r cos(2 j z 0 p -1 + ) y j = r sen(2 j z 0 p -1 + ) j = 0, 1,..., n z 0 = /res = 1.5 Å p = paso = /vuelta = 5.4 Å = 3.6 res/vuelta r = radio de la hélice = 2.3 Å

18. JJ L. Miranda Protein Sci 2003; 12: 73-81

19. Figure 2. pH dependence of the second-order rate constant of the reaction between DTNB and the control peptide (filled circles), N2 mutant (filled squares), N1 mutant (open triangles), or NC mutant (open diamonds) at an ionic strength of 0.175

21. Chorismate mutase

38. B. Licheniformis beta lactamase beta turn 68-71