Definition of "kilobase" []

• A length of double-stranded DNA containing two thousand nucleotides, one thousand on each strand (noun)
• A length of single-stranded RNA containing one thousand nucleotides (noun)

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• "Structural variations of DNA greater than 1 kilobase in size account for most bases that vary among human genomes, but are still relatively under-ascertained."
• "This is consistent with the extensive sequence diversity present in domestic chicken (~5 single nucleotide polymorphisms (SNPs) per kilobase (kb) in pairwise comparisons) 6."
• "In the 117 megabases (Mb) of sequenced exome-containing intervals, the average rate of nucleotide differences between a pair of the Bushmen was 1.2 per kilobase, compared to an average of 1.0 per kilobase differing between a European and Asian individual."