One of two regions commonly used in mitochondrial DNA tests which does not code for any known function.
A number of small regions present in the variable regions of the light and heavy chains of antibodies in which the majority of the variability in antibody sequence occurs.
A hypervariable region (HVR) is a location within nuclear DNA or the D-loop of mitochondrial DNA in which base pairs of nucleotides repeat. Repeats in the hypervariable region are highly polymorphic.