in plasma membranes from control cells both guanosine 5'- [ beta , gamma-imido ] triphosphate [ p ( nh ) ppg ] plus lutropin and naf plus lutropin caused a 50-60-fold linear increase in cyclic amp production over 40min compared with 15-fold with p ( nh ) ppg and 6-fold with lutropin alone .
C0007603
plasma membranes
C0007634
cells