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The Fischer projection of an L-amino acid has the amino group on the left when the carbon chain is vertical with the carboxyl group at the top FIG
A cyclic amide
A cyclic ester
Milk sugar; a disaccharide formed by a Î˛-glycosidic linkage between C-4 of glucose and C-1 of galactose.
In DNA replication, the strand that grows away from the replication fork.
Abbreviation for lithium diisopropylamide LiN[CH(CH3)2]2. LDA is a strong, sterically hindered base
A reaction at equilibrium responds to any stress imposed on it by shifting the equilibrium in the direction that minimizes the stress.
In DNA replication, the strand that grows toward the replication fork.
The group, normally a halide ion, that is lost from carbon in a nucleophilic substitution or elimination.
see acid. LINK
The species that results by covalent bond formation between a Lewis acid and a Lewis base .
see base. LINK
A chemical formula in which electrons are represented by dots. Two dots (or a line) between two atoms represent a covalent bond in a Lewis structure. Unshared electrons are explicitly shown, and stable Lewis structures are those in which the octet rule is satisfied.
An atom or group attached to another atom, especially when the other atom is a metal
A catalyst for the hydrogenation of alkynes to cis-alkenes. It is composed of palladium, which has been â€śpoisonedâ€ť with lead(II) acetate and quinoline, supported on calcium carbonate.
A common geometry around an atom with the electron domains/groups (bonds or lone pairs) lying all in a straight line with bond angles of approximately 180 degrees. Commonly found with an sp hybridized atom, such as the carbons in ethyne.
A polymer in which the chain of repeating units is not branched.
Arrangement of two layers of phospholipids that constitutes cell membranes. The polar termini are located at the inner and outer membrane-water interfaces, and the lipophilic hydrocarbon tails cluster on the inside.
Biologically important natural products characterized by high solubility in nonpolar organic solvents
Literally, â€śfat-lovingâ€ť; synonymous in practice with hydrophobic.
A polymer that retains active sites capable of further reaction on addition of more monomer
In IUPAC nomenclature, a prefix that designates the atom that is associated with a particular structural unit. The locant is most often a number, and the structural unit is usually an attached substituent as in 2-chlorobutane.
See induced-dipole/induced-dipole attraction LINK
A protein which carries cholesterol from the liver through the blood to the tissues. Elevated LDL levels are a risk factor for heart disease; LDL is often called â€śbad cholesterol.â€ť
The orbital of lowest energy that contains none of a moleculeâ€™s electrons; the lowest unoccupied molecular orbital