LEHNINGER PRINCIPLES
OF BIOCHEMISTRY 8TH
EDITION BY DAVID L.
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, Energy possessed by a body by virtue of
its position relative to others.
Hydrolysis reaction
A chemical reaction involving the
breaking of a bond in a molecule using
water.
Electron transport
The process by which electrons are
transferred through a series of proteins in
the mitochondrial membrane.
Substrate concentration
The amount of substrate present in a
reaction, which can affect the reaction rate.
Activation energy
The minimum energy required for a
chemical reaction to occur.
Electron sink
A molecule that can accept electrons,
stabilizing negative charges.
ΔG'°
The change in free energy under standard
conditions, measured in kJ/mol.
Oxidizing agent
A substance that gains electrons in a redox
reaction.
NAD+
The oxidized form of nicotinamide
adenine dinucleotide, which acts as an
electron acceptor.
NADH
The reduced form of nicotinamide adenine
dinucleotide, which acts as an electron
donor.
Electronegativity
A measure of the tendency of an atom to
attract a bonding pair of electrons.
Hydride transfer
The transfer of a hydride ion (H-) from
one molecule to another.
Phosphocreatine
A phosphorylated compound used by
vertebrates for energy storage.
Phosphoarginine
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, A phosphorylated amino acid used by
invertebrates similarly to phosphocreatine.
Standard reduction potential
The measure of the tendency of a chemical
species to acquire electrons and thereby be
reduced.
Nernst equation
An equation that relates the standard
reduction potential of a redox pair to its
actual reduction potential at any
concentration.
ΔG
The change in free energy for a reaction,
indicating the spontaneity of the process.
Equilibrium constant (K'eq)
A value that expresses the ratio of the
concentrations of products to reactants at
equilibrium.
Extinction coefficient
A measure of how strongly a chemical
species absorbs light at a given
wavelength.
pH
Actual free energy
The free energy change under cellular
conditions, calculated using the ratio of
reactants and products.
Redox potential
The affinity of a substance to accept
electrons.
Nucleotide forms for DNA replication
3' triphosphates.
Hydrolysis of glucose 6-phosphate
99% complete at equilibrium, meaning
only 1% of the substrate remains.
Standard transformed free energy symbol
ΔG'°.
High energy compound
Phosphocreatine, ATP,
phosphoenolpyruvate, and acetyl-CoA are
all classified as high energy.
Muscle contraction energy conversion
Chemical energy is converted to kinetic
energy.
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