after iso-osmotic salt loading ( 1 % nacl , 1.25 % kcl , 0.75 % mgcl2 solutions , each load making up 5 % body weight ) the water voles excreted 66.2 % sodium , 84.4 % potassium , 18.8 % magnesium over a 4 hr period .
C0024472
mgcl2
C0024467
magnesium