Proliferation of the endoplasmic reticulum occurs normally in cells that lack a functional unfolded protein response.

Abstract excerpt

Increased expression of certain ER membrane proteins leads to biogenesis of novel ER membrane arrays. These structures provide models in which to explore the mechanisms by which cells control the size and organization of organelles in response to changing physiological demands. In yeast, elevated levels of HMG-CoA reductase induce ER arrays known as karmellae. Cox and co-workers (1997) discovered that karmellae...

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