Their social status is measured by the number of rice field granaries, family heirlooms, gold earrings, carabaos (water buffaloes), as well as, prestige conferred through time and tradition.
The trifunctional enzymatic activities are conferred by two major domains, an aminoterminal portion containing the dehydrogenase and cyclohydrolase activities and a larger synthetase domain.
Two years later they identified a group of enzymes called sirtuins, which they found conferred the longevity and health benefits of kilojoule restriction.