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| ], or common table sugar, is composed of glucose and fructose.]] | ], or common table sugar, is composed of glucose and fructose.]] | ||
| In chemestry, a '''dimer''' is a ] composed of two subunits linked together. It is a special case of a ]. Among the most common dimers are certain types of ]; ], for example, is a dimer of a ] molecule and a ] molecule. | |||
| A '''physical dimer''' is a term that designate the case where intermolecular interaction bring two identical molecules closer together than other molecules. There is no chemical bonds between the physical dimer molecules. | |||
| In ], a dimer is a ] complex made up of two subunits. In a '''homodimer''' the two subunits are identical, and in a '''heterodimer''' they differ (though they are often still very similar in structure). The subunits do not need to be covalently linked, and usually aren't. | In ], a dimer is a ] complex made up of two subunits. In a '''homodimer''' the two subunits are identical, and in a '''heterodimer''' they differ (though they are often still very similar in structure). The subunits do not need to be covalently linked, and usually aren't. | ||
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Revision as of 14:09, 27 July 2005
In chemestry, a dimer is a molecule composed of two subunits linked together. It is a special case of a polymer. Among the most common dimers are certain types of sugar; sucrose, for example, is a dimer of a glucose molecule and a fructose molecule.
A physical dimer is a term that designate the case where intermolecular interaction bring two identical molecules closer together than other molecules. There is no chemical bonds between the physical dimer molecules.
In biology, a dimer is a protein complex made up of two subunits. In a homodimer the two subunits are identical, and in a heterodimer they differ (though they are often still very similar in structure). The subunits do not need to be covalently linked, and usually aren't.