Used in research settings to quantify levels of MUC5AC mucin in biological samples such as sputum, saliva, bronchoalveolar lavage fluid, and cell culture supernatants. This kit supports studies related to respiratory diseases including asthma, chronic obstructive pulmonary disease (COPD), cystic fibrosis, and bronchitis, where MUC5AC overexpression contributes to mucus hypersecretion. It is also applied in investigating mucin regulation in gastrointestinal and ocular surface disorders, as well as in cancer research, particularly in adenocarcinomas of the lung, stomach, and pancreas. The assay enables high-throughput screening of therapeutic agents targeting mucin production and helps assess the efficacy of anti-inflammatory or mucolytic drugs in preclinical models.