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Alveolar cisternae of glaucophyte Cyanophora paradoxa. (A) Overview. alvP, P fracture face of alvelolar membrane; alvE, E fracture face of alveolar membrane; pmP, P fracture face of plasma membrane; m, mucocyst. (B and C) Delicate and wispy (B) or more robust (C) sutures interconnecting the alveoli (arrows). Scale bars: A, 500 nm; B and C, 100 nm.
