Molecular biology

Molecular biology

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Molecular biology

Antioxidant

Biology; Biochemistry

A scavenger of reactive oxygen free radical species (OH Â· , O 2 -Â· , etc.) and other oxidising compounds; of particular importance are those that act as antioxidants in vivo, e.g. ascorbate, ...

C-terminal

Biology; Biochemistry

In a polypeptide sequence, that unique residue which is connected to the linear sequence by its amino group, leaving it with a free carboxy group. In practice, the carboxy group of a C-terminal ...

Paralogous

Biology; Biochemistry

Descriptive of homologous genes that have duplicated and evolved divergently, e.g. those encoding trypsin, chymotrypsin, elastase and thrombin, which are all serine proteinases and occur together ...

The site where the two polynucleotides of a parent DNA separate during replication. The daughter strands are attached to the two separated polynucleotides that trail away from the fork as it advances ...

Nucleotide

Biology; Biochemistry

A nucleoside with one, two or three phosphate(s) esterified to one of the free hydroxy groups of the sugar moiety, usually the 3'- or 5'-hydroxy group; ribonucleotide if the sugar is D-ribose; ...

Nucleoside

Biology; Biochemistry

A purine or pyrimidine base with a sugar attached in a glycosidic linkage; ribonucleoside if the sugar is D-ribose and deoxyribonucleoside if the sugar is D-deoxyribose.

Small nuclear RNA (snRNA)

Biology; Biochemistry

A category of polynucleotides, usually from 70 to 500 nucleotides in length. As complexes with proteins (snrps) they have several functions, among them the processing of pre-mRNA, either directly as ...