Microspectrography of formaldehyde and fluorescamine-induced fluorescence in rabbit pulmonary neuroepithelial bodies: Demonstration of a new,probably polypeptide intracytoplasmic substance

Summary The microspectrographic analysis of the fluorescence emitted by NEB's in gaseous formaldehyde-fixed lung tissue, posttreated with fluorescamine, revealed the presence of numerous primary amino groups which are clearly different from the serotonin identified in our earlier studies and correspond to a new, probably a polypeptide intracytoplasmic substance.Supported by a grant from the Council for Tobacco Research (USA) and the National Fonds voor Wetenschappelijk Onderzoek (Belgium). We thank C. Armee, M.-R. Van Hamme and E. Swinnen for technical, G. Pison for photographical and N. Tyberghien for secretarial assistance.