This gene controls the operator gene in cooperation with a chemical substance called inducer present in the cytoplasm. A regulator gene is not necessarily adjacent to the operator gene which it controls. The regulator gene codes for and produces a protein called repressor.
The Gram-positive bacteria include staphylococci (staph), streptococci (strep), pneumococci, and the bacterium responsible for diphtheria (Cornynebacterium diphtheriae) and anthrax (Bacillus anthracis). The Danish bacteriologist J.M.C. Gram (1853-1938) devised a method of staining bacteria using a dye called crystal (gentian) violet. Gram's method helps distinguish between different types of bacteria. The gram-staining characteristics of bacteria are denoted as positive or negative, depending upon whether the bacteria take up and retain the crystal violet stain or not.
Enterobacter. A genus of aerobic, facultatively anaerobic, non-spore-forming, motile bacteria (family Enterobacteriaceae) containing gram-negative rods. The cells are peritrichous, and some strains have encapsulated cells.Glucose is fermented with the production of acid and gas.The Voges-Proskauer test result is usually positive. genus of gram-negative, facultatively anaerobic, motile, rod-shaped bacteria. Organisms are widely distributed in nature and occur in the intestinal tracts of humans and animals. They are frequently a cause of nosocomial infections.