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Histidine positive charge

In this case also, the Cu(II) ion is coordinated to two histidine nitrogen atoms, a cysteine sulfur atom and a methionine sulfur atom with a distorted tetrahedral geometry. Since this protein has an overall positive charge (p/ = 10.6), it gives a well formed response for the Cu(II)/Cu(I) reduction ( ,o =+0.32 V vs. NHE) simply using a glassy carbon... [Pg.569]

Histidine is often dassified as a basic amino acid because it has a version of an amino group in the imidazole ring of its R group. However, its pK of 6,5-7 is close to neutral. Nevertheless, at physiologic pH, a (variable) percentage of the histidine in proteins will carry a positive charge and so it best fits that classification. [Pg.119]

Histidine is characterized by a heterocyclic side chain known as imidazole. The imidazole group will bear a positive charge under physiological conditions. Histidine is the metabolic precursor to histamine, a potent inflammatory molecule. Antihistamines work by antagonizing the action of histamine. [Pg.126]


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See also in sourсe #XX -- [ Pg.25 ]




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Positive charge

Positively charged

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