Common inflammatory disorders such as ulcerative colitis and Crohn’s disease can be diagnosed or monitored by measuring the protein calprotectin in stool samples, while serum levels of calprotectin could be used to monitor the inflammation status in rheumatoid arthritis. Calprotectin concentrations in patient samples are typically determined using antibodies that bind and detect the protein, for example, in lateral flow assays like the now all-too-familiar home COVID-19 test kits.
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Source: Phys.org