Jim Fixx Jim Fixx James Fuller "Jim" Fixx (April 23, 1932 – July 20, 1984) was an American who wrote the 1977 best-selling book "The Complete Book of Running". He is credited with helping start America's fitness revolution, popularizing the sport of running and demonstrating the health benefits of regular jogging. He died of a heart attack while jogging at 52 years of age. His genetic predisposition for heart problems and other previous lifestyle factors may have caused his heart attack. Born in New York City, Fixx was a graduate of Trinity School in New York and Oberlin College in Ohio. His
Promoter (genetics) in the cell only in response to specific stimuli. When referring to a promoter some authors actually mean promoter + operator; i.e., the lac promoter is IPTG inducible, meaning that besides the lac promoter, the lac operator is also present. If the lac operator were not present the IPTG would not have an inducible effect. Another example is the Tac-Promoter system (Ptac). Notice how tac is written as a tac promoter, while in fact tac is actually both a promoter and an operator. Promoter (genetics) In genetics, a promoter is a region of DNA that initiates transcription of a particular