All of the evidence provided on Hippocampome.org are quotes from scientific texts.
However, because quoted passages may be difficult to understand in isolation, contextual information and expanded abbreviations set in square brackets have been added for clarity.
"No SS [somatostatin] immunoreactivity was found in any 5-HT[serotonin] 3 R[receptor]-expressing neurons, although single SS-immunopositive or 5-HT 3 R-expressing neurons were identified readily in cortex and hippocampus."
Interpretation notes: Glutamatergic and GABAergic SOM+ types in CA1 SLM_SR_SP_SO are probably 5HT-3- by contrapositive logic