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Download e-book for iPad: Amino Acids and Peptides (1998) by G. C. Barrett

By G. C. Barrett

ISBN-10: 0511039522

ISBN-13: 9780511039522

ISBN-10: 0521462924

ISBN-13: 9780521462921

ISBN-10: 0521468272

ISBN-13: 9780521468275

This article is meant for undergraduate and starting graduate scholars in chemistry and biochemistry learning amino acids and peptides. The authors pay attention to amino acids and peptides with no specified discussions of proteins, whereas giving the entire crucial historical past chemistry, together with series decision, synthesis and spectroscopic tools. The procedure is meant to motivate the reader to go classical obstacles whereas gaining an realizing of protein habit on a molecular point. The e-book comprises chapters at the organic roles of amino acids, in addition to a piece on enzyme-catalyzed synthesis of peptides, with compatible examples, a space usually ignored in texts describing peptide synthesis. this contemporary textual content might be of worth within the amino acid, peptide and protein box, to complicated undergraduates, graduate scholars and learn staff.

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Amino Acids and Peptides - download pdf or read online

This article is meant for undergraduate and starting graduate scholars in chemistry and biochemistry learning amino acids and peptides. The authors pay attention to amino acids and peptides with out unique discussions of proteins, whereas giving the entire crucial history chemistry, together with series selection, synthesis and spectroscopic tools.

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Additional info for Amino Acids and Peptides (1998)

Example text

7 Polypeptides and proteins: quaternary structure and aggregation The association of two or more identical polypeptide molecules to form an overall globular protein is often found to occur for enzymes and other proteins, the resulting overall entity representing their quaternary structure. This association behaviour can be demonstrated using synthetic peptides. g. , 1991). 8 Examples of conformational behaviour spectroscopy (Chapter 3). 7). 8 Examples of conformational behaviour; ordered and disordered states and transitions between them There are direct consequences of the amino-acid make-up and sequence of aminoacid residues within a peptide (its primary structure) on its overall conformational behaviour.

The antibiotic Gramicidin S, with its alanyl residue replaced by ␣-amino-isobutyric acid (Ala→Aib, causing a trans→ cis configurational change at the amide bond at that location according to CD measurements) is inactive against Gram-positive bacteria. Insertion of Aib into a peptide generally restricts the local conformation to a left-handed or right-handed 310 ␤-bend or ␣-helix, the outcome depending on precisely what other residues are nearby. 5. The conformation of a ,-dipeptide in water. , 1987).

Nowadays, investigation of acid–base properties tends to be limited to the study of groups that are believed to be involved in the manifestation of biochemical and biological properties. Before ending this section, it is worth mentioning the special case of the phenolic hydroxy groups of tyrosyl groups, the pKa values of which can be determined uniquely by spectrophotometric titration. 2 Metal-binding properties of amino acids and peptides Amino acids are bidentate ligands for several transition metal ions.

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Amino Acids and Peptides (1998) by G. C. Barrett


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