Regulator gene

 The regulator gene is included in the Lac_operon. It refers to the gene 'whose products recognise the control elements, for example a repressor which binds to and regulates an operator sequence.' (Turner et al, 2005)

References

Turner, P. McLennan, A. Bates, A. White, M.(2005)
Molecular Biology, third edition. New York; Taylor & Francis group. Section L, Page 199.