neuroblastoma-glioma ng108-15 cells that were cultured for 48 h with the opiate antagonist , naloxone , respond to the guanosine 5'-triphosphate ( gtp ) analogue guanosine 5'- [ beta , gamma-imido ] -triphosphate ( gmp-pnp ) in the binding assay as the control , non-treated , cells .
C0018353
guanosine
C0018366
gmp-pnp