The cell can control a metabolic pathway by the presence or absence of a particular enzyme. The cell can also regulate the rate of reaction of key enzymes. The binding of the enzyme to its ...
In other cases, secondary reactions are physiologically irrelevant ... Promiscuous activities are important because they provide opportunities for evolution of new enzymes and new metabolic pathways, ...
Yale researchers are sifting through a mosaic of cells in a living animal—both normal cells and mutated cells—to better understand how cancer grabs a foothold. But they're starting by studying ...