- The As1-3 cells are neurons in Pleurobranchaea californica..
- NeuronBank Accession ID: Ple0002605
- The As1 cell is distinct from As2/3.
- These neurons are homologous to the DSIs in Tritonia.
- Located in the A-cluster in the dorsal cerebral ganglion
- The cluster of serotonergic neurons that they belong to was named the CeSP cluster.