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(A) Micronucleus (MIC) and macronucleus (MAC) in the ectoplasm of an E. caudatum cell that was not treated with any antibiotics. Both chromatin (electron dense dark areas) and granular nucleoli (gray areas) were visible in both the MIC and MAC. MAC and increased number of glycogen granules upon treatment with 1 mg/ml carbenicillin (B) and 0.1 mg/ml Normocin™ (C) for 48 h. The scale bars = 1 μm.
