Hydrogen Bonds
Polar molecules, such as water molecules, have a weak, partial negative charge at one region of the molecule (the oxygen atom in water) and a partial positive charge elsewhere (the hydrogen atoms in water).
hydrogen bond A weak bond between two atoms (one of which is hydrogen) with partial but opposite electrical charges.
hydrophilic Water-loving. Term applied to polar molecules that can form a hydrogen bond with water.
hydrogen bond
A type of weak chemical bond formed when the slightly positive hydrogen atom of a polar covalent bond in one molecule is attracted to the slightly negative atom of a polar covalent bond in another molecule.
hydrolysis ...
Hydrogen bond. A relatively weak bond formed between a hydrogen atom (which is covalently bound to a nitrogen or oxygen atom) and a nitrogen or oxygen with an unshared electron pair.
Hydrogen Bonds
When hydrogen is bonded to a more electronegative atom such as oxygen or nitrogen, a partial positive charge develops on the hydrogen due to unequal sharing of electrons.
Hydrogen bond A bond formed when two relatively electronegative atoms, such as oxygen or nitrogen, unequally share a hydrogen atom that is covalently bonded to one of the electronegative atoms.
[edit] Hydrogen bonding and stability
A GC base pair demonstrating three intermolecular hydrogen bonds
An AT base pair demonstrating two intermolecular hydrogen bonds ...
Hydrogen bond
A weak electrostatic link between an electronegative atom (such as oxygen) and a hydrogen atom which is linked covalently to another electronegative atom; hydrogen bonding is what makes water stick to itself.
hydrogen bond - bonds formed by polarized molecules (+ -), i.e. water.
hydrolysis - reaction in which water breaks the covalently linked compound A-B
hydrophilic - water "loving," hydrophilic molecule are soluble in water.
Hydrogen bonds, as shown in Figure 11, result from the weak electrical attraction between the positive end of one molecule and the negative end of another.
hydrogen bond. A relatively weak chemical bond resulting from unequal charge distribution within molecules, in which a hydrogen atom covalently bonded to another atom is attracted to the electronegative portion of another molecule.
These hydrogen bonding modes are for classical Watson-Crick base pairing. Other hydrogen bonding modes are seen in both DNA and RNA.
Closeup of a hydrogen bond - The Tyr 101 of the antibody forms a hydrogen bond with the Gln 121 of the antigen.
The pairing of complementary DNA or RNA sequences, via hydrogen bonding, to form a double-stranded polynucleotide. Most often used to describe the binding of a short primer or probe. Antibiotic.
DenaturationSeparation of two complementary strands of nucleic acid by breakage of the hydrogen bonds involved in base pairing. This is necessary prior to probe hybridisation and most methods involving enzymic DNA synthesis on a DNA template e.g.
The first three amino acids in a helix (N1, N2 and N3) and the preceding N-cap are unique, as their amide NH groups do not participate in backbone hydrogen bonding. We surveyed their structures in proteins and measured their amino acid preferences.
To replicate DNA in vitro, PCR takes advantage of a special property of the molecule: the hydrogen bonds. These bonds, which bind the complementary strands of DNA together in a double helix, are broken at elevated temperatures (about 95° C).
The alpha helix and beta sheet are referred to as secondary structure (the bonds that maintain the secondary structure are hydrogen bonds). The 3-D shape of a protein is the result of it folding on itself.
In fact they are held together by hydrogen bonds, a sort of electrical attraction between partially negative atoms on the base of one side with the partially positive atoms on the other. Both sides have positive and negative charges.
Water molecules stick to one another by hydrogen bond.
Water has high surface tension. It is essential to yield elasticity that drives the capillary waves.
Water has high adhesion properties.
coming together (annealling) of single-stranded nucleic acid sequences by hydrogen bonding of complementary bases to form double-stranded molecules; ...
Many approaches make use of the ability of single strands of DNA and/or RNA to hybridize to form double- stranded segments by hydrogen bonding between complementary bases.
In DNA it refers to the separation of the two component strands caused by the breaking of the hydrogen bonds. In proteins, it refers to disruptions in the secondary and tertiary structure of the protein, destroying its activity.
Related Terms: ...
nucleic acid hybridization - coming together (annealling) of single-stranded nucleic acid sequences by hydrogen bonding of complementary bases to form double-stranded molecules; ...
- Two nitrogen bases that pair by hydrogen bonding in the double stranded DNA. The pairing is always a purine with a pyrimidine
Betaine Aldehyde Dehydrogenase (BADH) ...
Denaturation: Reversible disruption of hydrogen bonds between nucleotides converting a double-stranded DNA molecule to single-stranded molecules. Heating or strong alkali treatment result in denaturation of DNA.
Separation of the two strands of a double-stranded DNA or RNA molecule by disrupting the hydrogen bonds that join the complementary bases from the two opposite strands, usually by heat or alkali. (Often called "melting".) ...
something like an immensely long ladder twisted into a helix, or coil. The sides of the "ladder" are formed by a backbone of sugar and phosphate molecules, and the "rungs" consist of nucleotide bases joined weakly in the middle by hydrogen bonds.
Attached to each sugar is one of four bases--adenine (A), cytosine (C), guanine (G), or thymine (T). The two strands are held together by hydrogen bonds between the bases, with adenine forming a base pair with thymine, ...
 See also: Molecule, Protein, DNA, Trans, Organ
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