| Feature | operon |
| Definition | region containing polycistronic transcript containing genes that encode enzymes that are in the same metabolic pathway and regulatory sequences |
| Mandatory Qualifiers |
/operon="free text" |
| Optional Qualifiers |
/allele="free text" /function="free text" /map="free text" /note="free text" /phenotype="free text" /pseudo /standard_name="free text" |