Neurotransmitters

Small Transmitter Molecules

Quaternary Amine

        Acetylcholine ( Ach )

Biogenic Amines

1.  Monoamines
     ( Catecholamines ):

    Dopamine ( DA )

    Norepinephrine
    ( Noradrenaline,  NA )

    Epinephrine
    ( Adrenaline,  EP,  Ad )

2.  Indolamines:

    Serotonin
    ( 5HT, 
      5 Hydroxytryptamine )

    Histamine

Aminoacid Neurotransmitters

Glutamate ( Glutamic Acid )

Gamma-Amino-Butyric-
Acid ( GABA )

Glycine

ATP

Adenosine

Neuropeptide Transmitters

Opioid Peptides

1.  Enkephalins:

    A.   Met-Enkephalin

    B.   Leu-Enkephaline

2.  Endorphins:

    Beta-Endorphin

3.  Dynorphins:

    Dynorphin-A

Peptide Hormones

Oxytocin

Vasopressin

Substance-P

Cholecystokinin ( CCK )

Hypothalamic Releasing
Hormones

Lipids

Anandamide

Soluble Gases

Nitric Oxide ( NO )

Carbon Monoxide ( CO )