<span>Smooth Endoplasmic Reticulum consists of the Nuclear Envelope, the Rough Endoplasmic Reticulum, the Smooth Endoplasmic Reticulum, and areas that contact other organelles. The Smooth Endoplasmic Reticulum fold protein molecules I'm not that tired</span>
Families I think, pretty sure
They form hydrogen bonds with the water cells so therefore strengthen the cell membrane. Hope this helped