Skip to main content
Select Source:

dimer

dimer A protein that is made up of two polypeptide chains or subunits paired together. If the subunits are identical in aminoacid sequence the protein is said to be homomeric; if they are different, it is heteromeric. Dimeric proteins may be detected by electrophoresis. In monomeric enzymes, the isoenzyme pattern of the heterozygote will represent a simple mixture of the two forms occurring by themselves in each of the corresponding homozygotes. In dimeric enzymes, there are homomeric forms representing the two homozygotes, but the heterozygote occurs in heteromeric form: when stained after electrophoresis, this results in three bands (instead of two bands as with a monomer). An example of a dimeric enzyme is glucose–phosphate isomerase. Some enzymes are trimeric (comprising three components) or tetrameric (with four components).

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"dimer." A Dictionary of Zoology. . Encyclopedia.com. 11 Dec. 2017 <http://www.encyclopedia.com>.

"dimer." A Dictionary of Zoology. . Encyclopedia.com. (December 11, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/dimer-0

"dimer." A Dictionary of Zoology. . Retrieved December 11, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/dimer-0

dimer

dimer A protein that is made up of two polypeptide chains or subunits paired together. If the subunits are identical in amino-acid sequence the protein is said to be homomeric; if they are different, it is heteromeric. Dimeric proteins may be detected by electrophoresis. In monomeric enzymes, the isozyme pattern of the heterozygote will represent a simple mixture of the two forms occurring by themselves in each of the corresponding homozygotes. In dimeric enzymes, there are homomeric forms representing the two homozygotes, but the heterozygote occurs in heteromeric form: when stained after electrophoresis, this results in 3 bands (instead of 2 bands as with a monomer). An example of a dimeric enzyme is glucose-phosphate isomerase. Some enzymes are trimeric (comprising 3 components) or tetrameric (with 4 components).

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"dimer." A Dictionary of Plant Sciences. . Encyclopedia.com. 11 Dec. 2017 <http://www.encyclopedia.com>.

"dimer." A Dictionary of Plant Sciences. . Encyclopedia.com. (December 11, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/dimer

"dimer." A Dictionary of Plant Sciences. . Retrieved December 11, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/dimer

dimer

di·mer / ˈdīmər/ • n. Chem. a molecule or molecular complex consisting of two identical molecules linked together. DERIVATIVES: di·mer·ic / dīˈmerik/ adj.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"dimer." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 11 Dec. 2017 <http://www.encyclopedia.com>.

"dimer." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (December 11, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/dimer

"dimer." The Oxford Pocket Dictionary of Current English. . Retrieved December 11, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/dimer