pergigabase
Pergigabase is a rate unit used in genomics to express the frequency of events per one billion base pairs of DNA. It provides a convenient, scalable way to compare mutation densities, variant discovery yield, sequencing error rates, and other genomic measures across samples, species, and sequencing technologies. The term can be written as gigabase (Gb or Gbp) with or without a space, and is often abbreviated as per Gb or per Gbp in practice.
Common applications include reporting the density of genetic variants—such as germline or somatic mutations—per gigabase, describing
Calculation and interpretation: if M events are observed in N gigabases of sequence, the density is M
Limitations: pergigabase is a normalized metric and not an absolute count. Densities can be affected by uneven