GENE
Exon 1
Intron
Exon 3
Intron
Exon 4
Exon 2
Intron
Promoter
Enhancer
mRNA transcript
Exon 1
Intron
Exon 3
Intron
Exon 4
Exon 2
Intron
5’-untranslated
region
5’
3’
Poly(A) signal
Exon 1
Exon 3
Exon 4
Exon 2
3’
3’-untranslated
region
(AAAAAA)n
Mataure mRNA
Transcription
Processing
7-mG cap
The Organization of an Eukaryotic Gene