| Presynaptic: transmitters | |||
| general considerations | |||
| criteria, types | |||
| small molecules | |||
| synthesis, location | |||
| peptides | |||
| roles, synthesis from precursors | |||
| co-existence | |||
| Postsynaptic: second messengers | |||
| access | |||
| 7 transmembrane domain receptors, G proteins | |||
| types | |||
| cAMP, AA, DAG, IP3 | |||
| protein kinases | |||
| truncating pathway | |||
| utility | |||
| lengthening of signal | |
| amplification of signal | |
| divergence to several targets | |
| convergence to single target | |
| spatial spreading of signal | |
| regulation of gene transcription | |