These bonds can occur between molecules (intermolecularly), or within different parts of a single molecule (intramolecularly). The hydrogen bond (5 to 30 kJ/mole) is stronger than a van der Waals interaction, but weaker than covalent or ionic bonds. This type of bond occurs in both ...
(redirected fromHydrogen bonds) Thesaurus Medical Encyclopedia hydrogen bond n. A chemical bond in which a hydrogen atom of one molecule is attracted to an electronegative atom, especially a nitrogen, oxygen, or fluorine atom, usually of another molecule. ...
Hydrogen bonds are critical non-covalent bonds essential for the structural integrity and function of biological molecules such as DNA and proteins. They facilitate proper protein folding, stability, and specific ligand interactions, such as antigen-antibody binding. Hydrogen bonding involves a hydrogen a...
Hydrogen bonding, interaction involving a hydrogen atom located between a pair of other atoms having a high affinity for electrons; such a bond is weaker than an ionic bond or covalent bond but stronger than the van der Waals forces. Hydrogen bonds can exist between atoms in different molecules...
The energies of interaction are of an order of magnitude less than covalent bonds but greater than the very simple non-directional non-covalent forces (van der Waals or dispersion forces) that occur between all molecules. The unit A is generally oxygen, nitrogen or halogen but S–H and in ...
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role in the history of structural biology. Both the structure of DNA and of protein a-helices and b-sheets were predicted based largely on the hydrogen bonds these structures form. So understanding hydrogen bonds is clearly important, but much like the hydrophobic effect, hydrogen bonds are ...
Upon covalent binding of the substrate, the IP form is predominantly formed. c, Proposed chemical states of enzyme-bound ThDP in the different monomers of the human transketolase dimer. d, Kinetics of active-site communication as measured by temperature-jump analysis. The changes in the IP and ...
The atoms in the oxygen molecule, O2, are held together by: a. a single covalent bond b. a double covalent bond c. a triple covalent bond d. an ionic bond e. a magnetic dipole bond The bonds that hold together the atoms in liquid helium are: a) i...
A hydrogen bond tends to be stronger thanvan der Waals forces, but weaker thancovalent bondsorionic bonds. It is about 1/20th (5%) the strength of the covalent bond formed between O-H. However, even this weak bond is strong enough to withstand slight temperature fluctuation. ...