EOG82FW04 GO:0005509 26/74 calcium ion binding molecular_function "Interacting selectively and non-covalently with calcium ions (Ca2+)." [GOC:ai] EOG82FW04 GO:0038032 2/74 termination of G-protein coupled receptor signaling pathway biological_process "The signaling process in which G-protein coupled receptor signaling is brought to an end. For example, through the action of GTPase-activating proteins (GAPs) that act to accelerate hydrolysis of GTP to GDP on G-alpha proteins, thereby terminating the transduced signal." [GOC:bf, GOC:signaling] EOG82FW04 GO:0005783 1/74 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] EOG82FW04 GO:0007030 1/74 Golgi organization biological_process "A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of the Golgi apparatus." [GOC:dph, GOC:jl, GOC:mah]