EOG87Q0NB GO:0016020 5/13 membrane cellular_component "A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it." [GOC:dos, GOC:mah, ISBN:0815316194] EOG87Q0NB GO:0007264 5/13 small GTPase mediated signal transduction biological_process "Any series of molecular signals in which a small monomeric GTPase relays one or more of the signals." [GOC:mah] EOG87Q0NB GO:0005525 5/13 GTP binding molecular_function "Interacting selectively and non-covalently with GTP, guanosine triphosphate." [GOC:ai] EOG87Q0NB GO:0005622 5/13 intracellular cellular_component "The living contents of a cell; the matter contained within (but not including) the plasma membrane, usually taken to exclude large vacuoles and masses of secretory or ingested material. In eukaryotes it includes the nucleus and cytoplasm." [ISBN:0198506732] EOG87Q0NB GO:0004767 1/13 sphingomyelin phosphodiesterase activity molecular_function "Catalysis of the reaction: H(2)O + sphingomyelin = ceramide + choline phosphate + H(+)." [EC:3.1.4.12, RHEA:19256]