NCIt definition : Chromogranins are acidic secretory glycoproteins with a widespread but specific distribution
in neuroendocrine tissues. The chromogranin family is heterogenous, consisting of
propeptides such as chromogranin-A, chromogranin-B and secretogranin II, which can
either elicit an effect themselves, or serve as precursors to a large number of peptides,
which are biologically more active.;