EOG8B8MX6 GO:0005783 1/84 endoplasmic reticulum cellular_component "The irregular network of unit membranes, visible only by electron microscopy, that occurs in the cytoplasm of many eukaryotic cells. The membranes form a complex meshwork of tubular channels, which are often expanded into slitlike cavities called cisternae. The ER takes two forms, rough (or granular), with ribosomes adhering to the outer surface, and smooth (with no ribosomes attached)." [ISBN:0198506732] EOG8B8MX6 GO:0008157 1/84 protein phosphatase 1 binding molecular_function "Interacting selectively and non-covalently with the enzyme protein phosphatase 1." [GOC:jl]