Used in biochemical and biomedical research to quantify levels of mitochondrial respiratory chain complex I in pig tissue samples, particularly in studies related to mitochondrial function, energy metabolism, and oxidative stress. Commonly applied in veterinary science, toxicology, and agricultural research to assess mitochondrial health in organs such as heart, liver, and muscle. Enables detection of complex I deficiencies or damage caused by disease, environmental toxins, or genetic factors. Supports development of diagnostic methods and evaluation of therapeutic interventions in swine models.