title: The replacement of calcium by terbium as an allosteric effector of hemocyanins.
mesh_terms: D000494:Allosteric Regulation; D000495:Allosteric Site; D000818:Animals; D002118:Calcium; D006433:Hemocyanins; D007700:Kinetics; D008121:Nephropidae; D010100:Oxygen; D011485:Protein Binding; D013050:Spectrometry, Fluorescence; D013725:Terbium
chemical_list: D013725:Terbium; D006433:Hemocyanins; D010100:Oxygen; D002118:Calcium