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The amino acid at the end of a peptide or protein chain that has its Î±-amino group intact; that is, the Î±-amino group is not part of a peptide bond.
Common name for butane CH3CH2CH2CH3
The group CH3CH2CH2CH2 --
A compound of the type R2N-N=O. R may be alkyl or aryl groups, which may be the same or different. N-Nitroso amines are formed by nitrosation of secondary amines.
The common name for pentane, CH3CH2CH2CH2CH3
A form of elemental carbon composed of a cylindrical cluster of carbon atoms.
The common name for 2,2-dimethylpropane, (CH3)4C.
Synonymous with cross-linked polymer LINK
Substance, usually a naturally occurring amine, that mediates the transmission of nerve impulses.
Method for depicting conformations in which one sights down a carbon-carbon bond and represents the front carbon by a point and the back carbon by a circle. FIG
Replacement of a hydrogen by an â€“NO2 group. The term is usually used in connection with electrophilic aromatic substitution Equ
A compound of the type FIG . R may be alkyl or aryl. Also known as alkyl or aryl cyanides. LINK
The molecular weight of a substance that contains C,H, O, and N is odd if the number of nitrogens is odd. The molecular weight is even if the number of nitrogens is even.
See N-nitroso amine. LINK
The reaction of a substance, usually an amine, with nitrous acid. Primary amines yield diazonium ions; secondary amines yield N-nitroso amines. Tertiary aromatic amines undergo nitrosation of their aromatic ring.
The elements in group 8A of the periodic table (helium, neon, argon, krypton, xenon, radon). Also known as the rare gases, link they are, with few exceptions, chemically inert.
A plane drawn through an orbital where the algebraic sign of a wave function changes. The probability of finding an electron at a node is zero.
Nonsteroidal anti-inflammatory drugs.
A method for structure determination based on the effect of molecular environment on the energy required to promote a given nucleus from a lower energy spin state to a higher energy state.
A polynucleotide present in the nuclei of cells.
An atom or ion that has an unshared electron pair which can be used to form a bond to carbon. Nucleophiles are Lewis bases.
Nucleoplhilic substitution at the carbon atom of an acyl group
The characteristic reaction of an aldehyde or a ketone. An atom possessing an unshared electron pair bonds to the carbon of the C=O group, and some other species (normally hydrogen) bonds to the oxygen. FIG
Reaction in which a nucleophile replaces a leaving group, usually a halide ion, from sp3-hybridized carbon. Nucleophilic aliphatic substitution may proceed by either an SN1 or an SN2 mechanism.
A reaction in which a nucleophile replaces a leaving group as a substituent on an aromatic ring. Substitution may proceed by an addition-elimination mechanism or an elimination-addition mechanism.
A measure of the reactivity of a Lewis base in a nucleophilic substitution reaction.
The combination of a purine or pyrimidine base and carbohydrate, usually ribose or 2-deoxyribose
A DNA-protein complex by which DNA is stored in cells
The phosphate ester of a nucleoside