View source for Dimer

A dimer is a macromolecular complex comprised of two identical [[Macromolecules|sub-units]] bound together through identical binding sites<ref>B. Alberts, A Johnson, J. Lewis, M. Raff, K. Roberts and P. Walter 2002, Molecular Biology of The Cell, 4th Edition New York, Garland Science Taylor and Francis Group P. 147</ref>. Possibly the most common dimers found are the [[Pyrimidine|pyrimdine]] dimers caused by [[Ultraviolet|ultraviolet]] irradiation from the sun, it causes two neighbouring [[Pyrimdine|pyrimdine]] bases in the [[Nucleotides|DNA nucleotide]] sequence to form bonds between each other thus causing a "distortion" in the [[DNA|DNA]] sequence and thus the [[DNA helix|DNA helix]]<ref>B. Alberts, A Johnson, J. Lewis, M. Raff, K. Roberts and P. Walter 2002, Molecular Biology of The Cell, 4th Edition New York, Garland Science Taylor and; Francis Group P. 269</ref>.&nbsp;Another well studied dimer is the Cro repressor protein, a molecule formed by two identical protein sub-units, which is used to regulate [[Genes|genes]] in [[Bacteria|bacteria]]<ref>B. Alberts, A Johnson, J. Lewis, M. Raff, K. Roberts and P. Walter 2002, Molecular Biology of The Cell, 4th Edition New York, Garland Science Taylor and Francis Group P. 147</ref>.&nbsp;<sup></sup><br> 

=== Types of dimer  ===

==== Homodimer  ====

A [[Homodimer|homodimer]] is a dimer consisting of two identical macromolecules,&nbsp; 

==== Heterodimer  ====

A [[Heterodimer|heterodimer]] is a dimer consisting of two different macromolecules. 

=== References  ===

<references />