'''Aquaporins''' are a class of
Cingular ringtones integral membrane proteins that form
Silvia Saint pores in the
Verizon ringtones cell membrane/membrane of
Veronika Zemanova cell (biology)/biological cells and selectively conduct
Nextel ringtones water
Anetta Keys molecules in and out, while preventing the passage of
Polyphonic ringtones ions and other solutes. Also known as '''water channels,''' they are each composed of four (typically) identical subunit proteins. Water molecules traverse the narrowest portion of the channel single file. The presence of water channels increases the permitivity of membranes to water by as much as ten fold. Many human
Tawny Roberts biological_tissue/cell types express them, as do certain
Cell phone ringtones bacterium/bacteria and many other
Zdenka Podkapova organisms. Genetic defects involving aquaporin
Cingular Ringtones genes have been associated with several human diseases.
The
as scores 2003
produce a Nobel Prize in Chemistry was awarded to
writes josef Peter Agre and
harrassment rosen Roderick MacKinnon for their discovery of aquaporin.
External References*http://www.ks.uiuc.edu/Research/aquaporins/
*Animation http://www.nobel.se/chemistry/laureates/2003/chemanim1.mpg
author resumes de:Aquaporin
fatimid period fr:Aquaporine
two greek Tag: Integral membrane proteins