2 example sentences using exon.
Exon used in a sentence
Exon in a sentence as a noun
It is not called "Selfish Adenine" or "Selfish exon".Your analogy is interesting.
I may be misinterpreting what you said but it seems as though you consider 'start' 'stop' 'intron' 'exon' 'suppress' as properties of transcription factors.
Exon definitions
noun
sequence of a gene's DNA that transcribes into protein structures; "exons are interspersed with introns"