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Fig. 11. Anoga-DH31 has natriuretic activity in tubules previously
challenged with Musdo-K. Fluid secretion and urine Na+ and
K+ concentrations were measured over 30 min intervals under control
conditions and after the addition of 1 µmol l1 Musdo-K
alone and then in combination with 1 µmol l1
Anoga-DH31. Bars represent the means +
S.E.M. for eight tubules. Fluid secretion
(open bars) is stimulated 4-fold by Musdo-K, but the urine
[Na+]:[K+] ratio (solid bars) is unchanged. Both
parameters are increased >6-fold after the addition of
Anoga-DH31. Identical letters indicate values that do not differ
significantly (P>0.05).