914-765-0688. 1  Beehive Restaurant, serving Traditional American with a few Mediterranean dishes, is located at 30 Old Route 22, Armonk, NY 10504 in Westchester County. 2  The Cafe at Mariani Gardens is located at 45 Bedford Road in Armonk, NY 10504 in Westchester County.
The Discovery of the lac Operon. In 1961, Francois Jacob and Jacques Monod proposed the operon model of gene regulation in bacteria. The model was based on their study of the genes in E. coli that code for enzymes that affect the breakdown of lactose. Francois Jacob and Jacques Monod. Photo courtesy of Archive Photo. Because of the pioneering work of Jacob and Monod, the lac operon is typically used to illustrate gene regulation in bacteria.
One of these mutations can occur in the repressor genes such that the protein loses affinity for the operator, and causes the continual production of the inducible enzymes regardless of if lactose was present or not. Therefore, the lac operon becomes constitutive.tructure and Mechanism. The lac operon consists of three structural genes, Z, Y and A, which code for the enzymes necessary to catabolize lactose and a regulator gene, I, which codes for a regulator protein. The regulator protein regulates the operon.