EOG88973M	GO:0005874	1/80	microtubule	cellular_component	"Any of the long, generally straight, hollow tubes of internal diameter 12-15 nm and external diameter 24 nm found in a wide variety of eukaryotic cells; each consists (usually) of 13 protofilaments of polymeric tubulin, staggered in such a manner that the tubulin monomers are arranged in a helical pattern on the microtubular surface, and with the alpha/beta axes of the tubulin subunits parallel to the long axis of the tubule; exist in equilibrium with pool of tubulin monomers and can be rapidly assembled or disassembled in response to physiological stimuli; concerned with force generation, e.g. in the spindle." [ISBN:0879693568]
EOG88973M	GO:0005525	1/80	GTP binding	molecular_function	"Interacting selectively and non-covalently with GTP, guanosine triphosphate." [GOC:ai]
EOG88973M	GO:0004930	1/80	G-protein coupled receptor activity	molecular_function	"Combining with an extracellular signal and transmitting the signal across the membrane by activating an associated G-protein; promotes the exchange of GDP for GTP on the alpha subunit of a heterotrimeric G-protein complex." [GOC:bf, http://www.iuphar-db.org, Wikipedia:GPCR]
EOG88973M	GO:0007017	1/80	microtubule-based process	biological_process	"Any cellular process that depends upon or alters the microtubule cytoskeleton, that part of the cytoskeleton comprising microtubules and their associated proteins." [GOC:mah]
EOG88973M	GO:0016020	1/80	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]