For example , the promoter of a conserved gene or operon may also be conserved .
Non-coding sequences important for gene regulation , such as the binding or recognition sites of ribosomes and transcription factors , may be conserved within a genome .
The promoter of a conserved gene or operon may also be conserved .
Non-coding sequences important for gene regulation , such as the binding or recognition sites of ribosomes and transcription factors , may be conserved within a genome .