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Effect of Gram's iodine stain on the cellulolytic zone in plates with CMC agar. (A through E) Degradation halos of strains isolated from Mytilus chilensis. (A) MC3; (B) MC18; (C) MC21; (D) MC23; (E) MC25. (F through I) Degradation halos of strains isolated from Mesodesma donacium. (F) MA2; (G) MA3; (H) MA5; (I) MA11. (J) Aspergillus niger cellulase (Sigma) served as the positive control for cellulase activity.
