Cistron and Structural gene

Cistron noun - (genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as well as introns between the exons; it is considered a unit of heredity.

Structural gene and cistron are semantically related in gene that makes repressor topic. In some cases you can use "Structural gene" instead a noun "Cistron".

Structural gene noun - A gene that controls the production of a specific protein or peptide.

Cistron and structural gene are semantically related in gene that makes repressor topic. You can use "Cistron" instead a noun phrase "Structural gene".