《英文msh詞典》Mobile Genetic Elements
[同義詞] Mobile Genetic Elements
[主題詞] Interspersed Repetitive Sequences
[中文釋義] 活動基因成分
[英文釋義] 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.