mouse phrenic nerve-hemidiaphragm preparations were incubated for 10 min at 37 degrees c in an oxygenated medium containing all the constituents reported as essential for the sodium-dependent high-affinity choline uptake system , including [ 3h ] choline chloride , 3.1 ci/mmol , 2.5 microm .
C0008405
choline
C0008409
choline chloride