Kilobase

Kilobase (kb) is a unit of measurement in molecular biology equal to 1000 base pairs of DNA or RNA. The length of a gene or an organism's entire genome is often measured in kilobases.

Definition

A base pair (bp) is a fundamental unit of double-stranded nucleic acids like DNA and RNA, consisting of two nucleobases bound to each other by hydrogen bonds. A kilobase is a unit of measurement in molecular biology equal to 1000 base pairs of DNA or RNA.

Usage

In genetics, the size of an organism's genome is often measured in kilobases. For example, the genome of the bacterium Escherichia coli is about 4,600 kilobases long. The human genome is about 3,200,000 kilobases long.

See also

• Base pair
• Genome
• Molecular biology
• Nucleic acid sequence

Kilobase Resources
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