Nucleo-Cytoplasmic Exchange

ID #1222

Why are there ribosomes on the nucleus?

There are ribosomes on the surface of the nuclear envelope precisely because the membrane of the RER is continuous with the outer membrane of the nuclear envelope. What you can find in the RER you might find in the outer nuclear membrane because of the proximity, but remember that synthesizing a protein into the perinuclear space doesn't get it into the nucleus!

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