Octopamine (OA), also known as '''para-octopamine and norsynephrine''' among synonyms, is an organic chemical closely related to norepinephrine, and synthesized biologically by a homologous pathway. Octopamine is often considered the major "fight-or-flight" neurohormone of invertebrates. Its name is derived from the fact that it was first identified in the salivary glands of the octopus.
Octopamine (OA), also known as '''para-octopamine and norsynephrine among synonyms, is an organic chemical closely related to norepinephrine, and synthesized biologically by a homologous pathway. Octopamine is often considered the major "fight-or-flight" neurohormone of invertebrates. Its name is derived from the fact that it was first identified in the salivary glands of the octopus.
In many types of invertebrates, octopamine is an important neurotransmitter and hormone. In protostomes—arthropods, molluscs, and several types of worms—it substitutes for norepinephrine and performs functions apparently similar to those of norepinephrine in mammals, functions that have been described as mobilizing the body and nervous system for action. In mammals, octopamine is found only in trace amounts (i.e., it is a trace amine), and no biological function has been solidly established for it. It is also found naturally in numerous plants, including bitter orange.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).