the divalent cations magnesium , calcium and manganese , and the monovalent cation , potassium , but not sodium , enhance binding of [ 125i ] iodo-porcine follicle-stimulating hormone to follicle-stimulating hormone ( fsh ) receptors in membranes of porcine granulosa cells via an increase in the apparent number of binding sites .
C0007448
divalent cations
C0007447
cation