Caffeine addicts REJOICE--Bethany Swinehart

The genes in coffee have been identified that make good coffee good and bad coffee, well bad. The good part of the coffee is the sucrose levels. They are controlled by either the SUS1 or the SUS2 gene. This gene's expression is affected by the ripening and the picking of the product. For one reason this is determined is because certain blends of coffee beans are more bitter than others. This is due to the metabolism of a certain sugar during the growth and maturation of the bean.