Microsome membrane {By
Similarity}; Single-pass type II membrane protein {By
Similarity}. Endoplasmic reticulum membrane {By
Similarity}; Single-pass type II membrane protein {By
Similarity}. Nucleus envelope {By
Similarity}. Note=Localization in the nuclear envelope depends upon the nuclear import machinery. {By
Similarity}.
The nuclear envelope is a membrane system which surrounds the nucleoplasm of eukaryotic cells. It is composed of the nuclear lamina, nuclear pore complexes and two nuclear membranes. The space between the two membranes is called the nuclear intermembrane space.