Used in biomedical research to quantify levels of human arylsulfatase A (ASA) in biological samples such as serum, plasma, or cell lysates. This ELISA kit enables researchers to study ASA activity and expression in relation to lysosomal storage disorders, particularly metachromatic leukodystrophy (MLD), where ASA deficiency leads to accumulation of sulfatides. It supports diagnosis development, monitoring of disease progression, and evaluation of therapeutic interventions in clinical and preclinical studies. The assay is also applied in enzyme replacement therapy research and biomarker validation.