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Titration profile histidine

Titration profiles of the basic and acidic amino acids lysine and aspartic acid are shown in Figures 2-9 and 2-10. The R-groups are ionized at physiological pH and have anionic and cationic groups, respectively. The pi value for aspartic acid is the arithmetic mean of pKj and pK2, whereas for lysine and histidine the pi values... [Pg.31]

In isoenzyme I, the titration behavior of zinc H20 is complicated due to the presence of three titratable active-site histidines as described in Section VI.D. Lindskog reports a value of 7.1 for the pKa of zinc-H20 (142), but higher values were obtained by other authors. The pH-rate profile for 4-nitrophenyl acetate esterase activity yields pKa = 7.45 (142). [Pg.167]

See other pages where Titration profile histidine is mentioned: [Pg.28]    [Pg.31]    [Pg.1057]    [Pg.703]    [Pg.229]    [Pg.130]    [Pg.1092]    [Pg.173]    [Pg.379]    [Pg.280]   
See also in sourсe #XX -- [ Pg.31 ]



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Histidine titration

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