In biochemistry, monoamines are a group of organic compounds containing only one amino group. The first three neurotransmitters that comprise the monoamine group are a sub-group called catecholamines they are dopamine, epinephrine and norepinephrine. The fourth is serotonin or 5-HT, an indoleamine. Several mood disorders are explained as due to either an excess or deficiency of monoamines. When a cell needs to transport a monoamine in or out of a cell, they use a class of proteins called monoamine transporters. Biochemistry is the chemistry of life, a bridge between biology and chemistry that studies how complex chemical reactions give rise to life. ... Jump to: navigation, search An organic compound is any member of a large class of chemical compounds whose molecules contain carbon, with exception of carbides, carbonates, carbon oxides and gases containing carbon. ... In chemistry, especially in organic chemistry and biochemistry, an amino group is an ammonia-like functional group. ... Neurotransmitters are chemicals that are used to relay, amplify and modulate electrical signals between a presynaptic and a postsynaptic neuron. ... Catecholamines are chemical compounds derived from the amino acid tyrosine that act as hormones or neurotransmitters. ... Jump to: navigation, search Dopamine is a chemical naturally produced in the body. ... Epinephrine (INN) or adrenaline (BAN) is a hormone and a neurotransmitter of molecular weight 183. ... Jump to: navigation, search Norepinephrine, known as noradrenaline outside the USA, is a catecholamine and a phenethylamine with chemical formula C8H11NO3. ... Jump to: navigation, search Serotonin (5-hydroxytryptamine, or 5-HT) is a monoamine neurotransmitter synthesised in serotonergic neurons in the central nervous system and enterochromaffin cells in the gastrointestinal tract. ... Jump to: navigation, search In biochemistry, indoleamines are substituted indole compounds that contain an amino group. ... A mood disorder is a condition where the prevailing emotional mood is distorted or inappropriate to the circumstances. ... Introduction There are several different monoamine transporters. ...