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(a) The number of antibacterial marine xanthones evaluated against Gram-positive and Gram-negative bacteria. Dark blue bar represents the total count of the assayed xanthones. Light blue bar represents the count of xanthones with MIC lower than 4 µg mL−1. (b) The bacteria that were assayed for antibacterial activity. Dark blue bar represents the total count of the assayed xanthones. Light blue bar represents the count of xanthones with MIC lower than 4 µg mL−1.
