A dopamine receptor is a type of protein found on the surface of certain cells in the brain and other parts of the body. These receptors bind to the neurotransmitter dopamine, which plays a key role in regulating mood, motivation, and reward. There are several types of dopamine receptors, classified mainly into two families: D1-like and D2-like receptors, each with different functions and effects. When dopamine attaches to its receptors, it triggers various cellular responses that influence behavior and physiological processes. Dysregulation of dopamine receptors is associated with several conditions, including Parkinson's disease, schizophrenia, and addiction, highlighting their importance in both mental and physical health.