By mapping the structure of a key enzyme involved in cholesterol production researchers have gained new insights into genetic disorders as well as the possibility of new approaches to lowering blood cholesterol when it becomes dangerously high. The cholesterol-making process in cells requires about 30 chemical reactions and 20 enzymes seven of which are embedded in the cellular membrane. The mapping project focused on one of these sterol reductase which helps two electrons travel from a molecule known as NADPH to another molecule that will eventually become cholesterol. This type of reaction is known as a reduction. 'This is the