Muscle contraction and the relative roles of calcium and magnesium.
D000818:Animals; D001001:Anura; D001692:Biological Transport; D002118:Calcium / Q000378:metabolism*; D008274:Magnesium / Q000378:metabolism*; D009119:Muscle Contraction / Q000502:physiology*
D008274:Magnesium; D002118:Calcium