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Intrinsic protein


noun, plural: intrinsic proteins

Any of the group of integral membrane proteins that facilitate specific transport of water molecules (e.g. by aquaporins), and of neutral solutes (e.g. glycerol by glycerol facilitators).


Examples of intrinsic proteins are:

Word origin: ML intrinsecus inward (adjective), L (adverb), equiv. to intrin- (int(e)r-.

Synonym: integral membrane protein (IMP).
Compare: extrinsic protein.
See also: cell membrane, fluid mosaic model.

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Theories - Origin of Life

... to require additional factors, such as chromosomal rearrangements, intrinsic genetic incompatibilities and extended periods of allopatry, all ... of information and control above and beyond genome information. The proteins involved in epigenetic control (such as histones) are themselves ...

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by AstraSequi
Tue Mar 27, 2012 2:41 am
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 563
Views: 1127986

Re: Theories - Origin of Life

... here. The virus could not predate the cell because it is essentially a protein shell housing some bits of nucleic acid (either DNA or RNA, depending ... chemistry. Spontaneous self-organization is not known to be an intrinsic property of most organic matter, at least as observed in the laboratory. ...

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by scottie
Fri Aug 19, 2011 12:31 pm
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 563
Views: 1127986

Got a Biology Test back, had a question

... concentration gradient, active transport (ATP) against conc gradient, protein pores and what type of substances get let through eg. ions. I also mentioned the type of protiens used for example, intrinsic protein.

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by Daniel01
Tue Jan 06, 2009 9:30 pm
Forum: Cell Biology
Topic: Got a Biology Test back, had a question
Replies: 4
Views: 3215


... fluorescence, but they didn’t know about the enhancement on binding to proteins; that they discovered in the mid 1980s. I haven’t seen any good ... My guess is that adjacent adducts (or other bases, even) quench the intrinsic fluorescence of the adduct. Binding to protein disrupts the interbase ...

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by blcr11
Mon Sep 10, 2007 5:03 pm
Forum: Molecular Biology
Topic: poly(dεA)
Replies: 1
Views: 1669

cell membrane

... above and on my book, i think the two surfaces must be lipids, and proteins are just like some points stand out. What i mean is they don't cover ... they just occupy a point, not the whole two 'bread'. Yes, these are Intrinsic and Extrinsic proteins.... Covers 50% of surface area of cell membrane ...

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by sachin
Mon Jan 08, 2007 4:43 am
Forum: Cell Biology
Topic: cell membrane
Replies: 10
Views: 20756
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