Used to measure β-mannosidase enzyme activity in human biological samples such as serum, plasma, or cell lysates. This ELISA kit is commonly applied in clinical research and diagnostics to assess lysosomal storage disorders, particularly β-mannosidosis, a rare genetic condition caused by deficiency of β-mannosidase. It enables quantitative analysis for monitoring disease progression, evaluating enzyme replacement therapies, and supporting newborn screening programs. The assay is also used in metabolic disorder research and pharmaceutical development to study enzyme function and treatment efficacy.