Consider the amino acid lysine. Which of the followingbest describes where you p
ID: 3745 • Letter: C
Question
Consider the amino acid lysine. Which of the followingbest describes where you predict this amino
acid would be found?
a.) This amino acid is hydrophobic and would be on thesurface of a protein that is in the middle
of a membrane.
b.) This amino acid is hydrophilic and would be on thesurface of a protein that is in the middle
of a membrane.
c.) This amino acid is hydrophobic and would be in theinterior of a protein that is in the middle
of a membrane.
d.) This amino acid is hydrophilic and would be in theinterior of a protein that is in the middle of
a membrane.
e.)Not enough information is given to determine.
Explanation / Answer
B) Lysine is a polar amino acid and is thus hydrophilic andhydrophilic amino acid side chains prefer to be on the surface ofthe protein (since they're closer to the water surrounding theprotein while the hydrophobics group up in the inside of theprotein)