Copies of transposable elements interspersed throughout the genome, some of which are still active and often referred to as "jumping genes". There are two classes of interspersed repetitive elements. Class I elements (or RETROELEMENTS - such as retrotransposons, retroviruses, LONG INTERSPERSED NUCLEOTIDE ELEMENTS and SHORT INTERSPERSED NUCLEOTIDE ELEMENTS) transpose via reverse transcription of an RNA intermediate. Class II elements (or DNA TRANSPOSABLE ELEMENTS - such as transposons, Tn elements, insertion sequence elements and mobile gene cassettes of bacterial integrons) transpose directly from one site in the DNA to another.

Synonyms: Sequences, Dispersed Repetitive, Jumping Gene, Repetitive Elements, Interspersed, Interspersed Repetitive Sequences, Dispersed Repetitive Sequences, Repetitive Sequences, Interspersed, Repetitive Element, Interspersed, Repetitive Sequence, Interspersed, Genes, Jumping, Sequences, Interspersed Repetitive, Repetitive Sequences, Dispersed, Mobile Genetic Elements, Sequence, Dispersed Repetitive, Element, Interspersed Repetitive, Elements, Interspersed Repetitive, Genetic Element, Mobile, Jumping Genes, Interspersed Repetitive Sequence, Sequence, Interspersed Repetitive, Interspersed Repetitive Elements, Interspersed Repetitive Element, Mobile Genetic Element, Gene, Jumping, Genetic Elements, Mobile, Dispersed Repetitive Sequence, Repetitive Sequence, Dispersed, Element, Mobile Genetic, Elements, Mobile Genetic