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 dopamine, a neurotransmitter that plays a key role in mood, motivation, and reward. When dopamine attaches to its receptors, it triggers various responses in the cell, influencing behaviors and emotional states. There are several types of dopamine receptors, classified into two main families: D1-like and D2-like receptors. Each type has different functions and effects on the body. Dysregulation of dopamine receptors is associated with various conditions, including Parkinson's disease, schizophrenia, and addiction.