EOG8W3W1V GO:0005089 25/102 Rho guanyl-nucleotide exchange factor activity molecular_function "Stimulates the exchange of guanyl nucleotides associated with a GTPase of the Rho family. Under normal cellular physiological conditions, the concentration of GTP is higher than that of GDP, favoring the replacement of GDP by GTP in association with the GTPase." [GOC:mah] EOG8W3W1V GO:0050807 1/102 regulation of synapse organization biological_process "Any process that modulates the physical form of a synapse, the junction between a neuron and a target (neuron, muscle, or secretory cell)." [GOC:ai, GOC:dph, GOC:tb] EOG8W3W1V GO:0097482 1/102 muscle cell postsynaptic density cellular_component "A postsynaptic density that is part of a muscle cell." [GOC:pr]