A heritable change in the @N04255@ @ST06775@ of genomic @D01597@ (or @R05386@ in @R05386@ viruses), or in the number of @G02604@ or @C01077@ in a cell, which may occur spontaneously or be brought about by chemical mutagens or by radiation (induced mutation).
PAC, 1992, 64, 143. (Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992)) on page 161 [Terms] [Paper]