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Fig. 3. Carbonic anhydrase activity (A; µmol CO2 mg
protein1 min1) and mRNA expression (B;
relative amounts) in anterior (G4, black bars) and posterior (G8, gray bars)
gills of green crabs acclimated to 32 p.p.t. (32) and transferred to 10 p.p.t.
for 7 days (10-7days). Values are means ± s.e.m. (N=6).
T=12°C. Asterisks indicate statistical differences in G8 from the
32 p.p.t. controls at P<0.05.