Carrier protein

Jump to navigation Jump to search

WikiDoc Resources for Carrier protein

Articles

Most recent articles on Carrier protein

Most cited articles on Carrier protein

Review articles on Carrier protein

Articles on Carrier protein in N Eng J Med, Lancet, BMJ

Media

Powerpoint slides on Carrier protein

Images of Carrier protein

Photos of Carrier protein

Podcasts & MP3s on Carrier protein

Videos on Carrier protein

Evidence Based Medicine

Cochrane Collaboration on Carrier protein

Bandolier on Carrier protein

TRIP on Carrier protein

Clinical Trials

Ongoing Trials on Carrier protein at Clinical Trials.gov

Trial results on Carrier protein

Clinical Trials on Carrier protein at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Carrier protein

NICE Guidance on Carrier protein

NHS PRODIGY Guidance

FDA on Carrier protein

CDC on Carrier protein

Books

Books on Carrier protein

News

Carrier protein in the news

Be alerted to news on Carrier protein

News trends on Carrier protein

Commentary

Blogs on Carrier protein

Definitions

Definitions of Carrier protein

Patient Resources / Community

Patient resources on Carrier protein

Discussion groups on Carrier protein

Patient Handouts on Carrier protein

Directions to Hospitals Treating Carrier protein

Risk calculators and risk factors for Carrier protein

Healthcare Provider Resources

Symptoms of Carrier protein

Causes & Risk Factors for Carrier protein

Diagnostic studies for Carrier protein

Treatment of Carrier protein

Continuing Medical Education (CME)

CME Programs on Carrier protein

International

Carrier protein en Espanol

Carrier protein en Francais

Business

Carrier protein in the Marketplace

Patents on Carrier protein

Experimental / Informatics

List of terms related to Carrier protein


Overview

Carrier proteins are proteins that transport a specific substance or group of substances across intracellular compartments or in extracellular fluids (e.g. in the blood) or else across the cell membrane. Some of the carriers are water-soluble proteins that may or may not interact with biological membranes, such as some transporters of small hydrophobic molecules, whereas others are integral transmembrane proteins.

Carrier proteins of the cell membrane transport substances down their concentration gradient out of or into the cell by facilitated diffusion and active transport. Each carrier protein is designed to recognize only one substance or one group of very similar substances. The molecule or ion to be transported (the substrate) must first bind at a binding site at the carrier molecule, with a certain binding affinity. Following binding, and while the binding site is facing, say, outwards, the carrier will capture or occlude (take in and retain) the substrate within its molecular structure and cause an internal translocation, so that it now faces the other side of the membrane. The substrate is finally released at that site, according to its binding affinity there. All steps are reversible.

For example:

  1. Diffusion of sugars, amino acids,nucleoside.
  2. Uptake of glucose.

See also

External links

fi:Kantajaproteiini