Monoclonal antibody to carnosine synthetase identifies a subpopulation of frog olfactory receptor neurons.

A monoclonal antibody directed against the synthetic enzyme for the dipeptide carnosine was used on cryostat sections of olfactory epithelium from the grass frog Rana pipiens. A subpopulation of what morphologically resembled olfactory receptor neurons were immunolabelled by this antibody. Labelled cells were completely stained, including the cell body, axonal and dendritic processes, dendritic knobs and cilia-like projections from the knobs.