Aerotaxis is the movement of an organism in response to environmental oxygen concentrations, either towards or away from a given oxygen concentration. Many bacteria are microaerophilic meaning they prefer environments with low oxygen content. Higher or lower O2 content than the optimum are considered a repellant and bacteria will navigate towards the optimum. This animation is an overview of studying aerotaxis in motile bacteria.
Glycolysis is a determined sequence of ten reactions involving ten intermediate compounds (one of the steps involves two intermediates). The intermediates provide entry points to glycolysis. This animation features the 3D protein structures of all ten enzymes as well as the enzyme substrate and products.