Proteins are amphipathic molecules that contain nonpolar (hydrophobic) amino acids and polar (hydrophilic) amino acids. Where would you expect to find the hydrophobic and hydrophilic amino acid residues of a protein that spans a cell membrane?

0 votes

 

The hydrophobic regions of the protein would clump together in the protein interior through hydrophobic interactions, whereas the hydrophilic regions would be oriented outward, coming into contact with the phospholipid bilayer.

Membrane proteins are oriented such that their amino acid residues do not come into contact with the membrane interior.

Proteins are found only on the membrane surface. The hydrophilic regions would be attached to the phosphate groups of membrane phospholipids through ionic bonds, whereas the hydrophobic groups would be oriented toward the extracellular fluid.

The hydrophobic amino acids would be oriented toward the outside of the protein and come into contact with the hydrocarbon tails of the phospholipid bilayer, whereas the hydrophilic proteins would be more concentrated in the protein interior.

 

asked Dec 25, 2012 in Biology by anonymous
    

2 Answers

0 votes

this is the correct answer - from the answer key.

The hydrophobic amino acids would be oriented toward the outside of the protein and come into contact with the hydrocarbon tails of the phospholipid bilayer, whereas the hydrophilic proteins would be more concentrated in the protein interior.

answered Oct 21, 2013 by dahlingfox ~Rookie~ (79 points)
–1 vote

 

The hydrophobic regions of the protein would clump together in the protein interior through hydrophobic interactions, whereas the hydrophilic regions would be oriented outward, coming into contact with the phospholipid bilayer.

 

answered Dec 25, 2012 by anonymous

Related questions

0 votes
1 answer 32 views



...