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a–c, b–g; SEM micrographs of acid cleaned frustules of C. cryptica and N. curvilineata. a and e; controls. b, c and f, g; Treated with mycafungin. d; Fluorescent micrograph of HCK123 (pink)-stained C. cryptica treated with mycafungin (red = chlorophyll autofluorescence). Scale bar: a–d and f, g = 2 µm, e = 1 µm.
