Definition of "isochore" []

• A line drawn on a pressure / volume / temperature graph through all points having the same value of the volume (noun)
• A contour showing points of equal vertical thickness of strata; equal to an isopach if strata are horizontal (noun)
• A sequence of DNA that has a reasonably constant proportion of pairs of guanine and cytosine bases, and is rich in genes (noun)

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• "The densities of insertions/deletions in chromosomes 17 to 22 are reported for the five isochore families."
• "The slightly different amounts of DNA in isochore families between (A) and (B) are related to the fact that deletions in Venter's chromosomes are seen as insertions in the reference chromosomes, and the latter are slightly different from Venter's chromosomes because of insertions and deletions."
• "The distributions of insertions/deletions are in striking contrast with those of SNPs which exhibit almost the same density across all isochore families with, however, a trend for lower concentrations in gene-rich regions."