?:definition
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Immunoassay reagents intended to perform qualitative and/or quantitative analyses on a body fluid sample (typically serum) to determine a group of proteolytic enzyme precursors (proenzymes) known as pepsinogens, usually found in the gastric mucosa; pepsinogens are converted by acid in the active enzyme (pepsin). There are two groups of pepsinogens according to their immunological characteristics; they are classified as group 1 pepsinogens and group II pepsinogens. Pepsinogens can be determined using isotopic and nonisotopic immunoassays.
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