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. 1974 Dec;71(12):4662-5.
doi: 10.1073/pnas.71.12.4662.

Coexistence of several putative neurotransmitters in single identified neurons of Aplysia

M J Brownstein, J M Saavedra, J Axelrod, G H Zeman, D O Carpenter

Coexistence of several putative neurotransmitters in single identified neurons of Aplysia

M J Brownstein et al. Proc Natl Acad Sci U S A. 1974 Dec.

Abstract

By sensitive enzymatic micromethods several putative neurotransmitters were measured in four identifiable neurons of Aplysia californica (R-2, R-14, L-11, and C-1). Serotonin was found in all of these neurons, and octopamine in all but C-1. Acetylcholine has been previously reported to be present in R-2 and L-11. The catecholamines, norepinephrine and dopamine, were not detected in the four cells examined. The possible biological consequence of the presence of several putative transmitters in single identifiable neurons is discussed.

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