Hydrogen bonds, between carbohydrates

Hydrogen bonds, between carbohydrates and hydrophilic groupings of proteins of enzymes, V, 55 Hydrogen bromide, hydrolysis of polysaccharides with, II, 231 Hydrogen cyanide, reaction with osones, II, 80... 

The most important result, however, is the binding of the trisaccharide tri-N-acetylchitotriose, as the model proposed for substrate binding and enzymic hydrolysis is based on this compound. The three substituted /3-D-glucopyranose residues are labeled A, B, and C in Fig. 2. Two observations are the same as for 2-acetamido-2-deoxy-D-glucose residue C has the same binding as the /3-d anomer, and the resulting shift of amino acid residue 62 (L-tryptophan) is 0.75 A. The hydrogen bonds between lysozyme and carbohydrates A and B are shown in Fig. 2 and listed in Table IV. Residue A, which is located... 

Vibrational, spectroscopic studies of water and carbohydrate solutions have been performed, in order to provide information on the nature and variety of hydrogen bonding between molecules (see Sections 11,3 and V,2). It is generally accepted208,209 that i.r.- and Raman-spectral results concerning... 

At this stage of our knowledge, the occurrence of hydrogen bonding between hydroxyl groups and anionic oxygen in carbohydrate alcoholates has not been shown conclusively. That it probably does occur is strongly... 

As neutron diffraction and more accurate X-ray crystal structure analyses have become available, it is clear that this configuration 1 is quite common in the crystal structures of many biological small molecules. Surveys of the peptide NH 0=C hydrogen bond [56] and hydrogen bonds in carbohydrates [57-59], amino acids [60], purines and pyrimidines [61] and nucleosides and nucleotides [62] indicate that between 25% and 40% of the bonds in a sample of structures may be of this type. 

Table 9.2. Intramolecular hydrogen bonds between syndiaxially oriented O-H groups in carbohydrate crystal structures...

Figure 11.2 Schematic illustration of carbohydrates solvated by Br ions. Hydrogen bonding between hydroxyl groups and Br ions causes the solvation.

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