to gain insight into the mechanisms by which the divalent cations sr , ba , and mn affect neurotransmitter release from presynaptic nerve terminals , we examined the sequestration of these cations , in comparison to ca , by mitochondrial and nonmitochondrial [ presumably smooth endoplasmic reticulum ( ser ) ] organelles and the extrusion of these cations from isolated nerve terminals .
C0007448
divalent cations
C0007447
cations