Uptake ofl-DOPA andl-5-hydroxytryptophan by endocrine-like cells in the rat larynx

In the larynx of the rat, and to a lesser extentin the trachea and main bronchi, there are numerous cells which possess the amine-handling characteristics, but not the enzymatic ones, of the APUD series of endocrine polypeptide cells. The cytochemical properties of their contained granules, which are ultrastructurally atypical in reaching sizes up to 2000… (More)