Used to quantitatively measure endogenous levels of Human DDAH1 in biological samples such as serum, plasma, and cell lysates. This ELISA kit is widely applied in research settings to study the regulation of nitric oxide synthesis, as DDAH1 plays a key role in metabolizing asymmetric dimethylarginine (ADMA), a natural inhibitor of nitric oxide synthase. It is commonly used in cardiovascular disease research, endothelial dysfunction studies, and metabolic disorder investigations. The kit enables high sensitivity and specificity detection, supporting both clinical and preclinical research in understanding disease mechanisms and evaluating potential therapeutic targets.