EOG8M67ZK	GO:0005783	2/92	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]
EOG8M67ZK	GO:0046872	1/92	metal ion binding	molecular_function	"Interacting selectively and non-covalently with any metal ion." [GOC:ai]