The N-terminus of an integral membrane protein which projects into the lumen of
ID: 56518 • Letter: T
Question
The N-terminus of an integral membrane protein which projects into the lumen of the ER may also be found:
as a soluble cytoplasmic protein
with N-terminus protruding out of the cytoplasmic surface of the cell membrane into the cytosol
with N-terminus protruding out of the inner mitochondrial membrane
with N-terminus protruding out of the exoplasmic surface of the cell membrane into the extracellular space
with N-terminus protruding out of the nucleus from the nuclear membrane
as a soluble cytoplasmic protein
with N-terminus protruding out of the cytoplasmic surface of the cell membrane into the cytosol
with N-terminus protruding out of the inner mitochondrial membrane
with N-terminus protruding out of the exoplasmic surface of the cell membrane into the extracellular space
with N-terminus protruding out of the nucleus from the nuclear membrane
Explanation / Answer
Correct answer is: With N-terminus protruding out of the cytoplasmic surface of the cell membrane into the cytosol.
The signals of N-termal sequence is removed during translocation across the membrane and protuded out of the cytoplasmic surface of the cell membrane int to the cytosol.