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Fig. 3. Effect of the selective inhibitor SB203580 on the p38-MAPK and Hsp27
phosphorylation induced by CuCl2. Protein (50 µg, top and
bottom, and 100 µg, middle) from hearts perfused without or with 500
µmol l1 CuCl2 for 15 min in the absence or
presence of 1 µmol l1 SB203580 was analysed by
immunoblotting with phosphospecific anti-p38-MAPK (top), phosphospecific
anti-Hsp27 (middle) or anti-actin (bottom) antibodies. Western blots shown are
representative of four independent experiments performed with similar
results.