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Gel photograph of representative PCR tests for the detection of the luciferase gene in single cells of various Ceratium species. Lane contents: 1) 50 bp DNA marker; 2–4) Ceratium fusus; 5–7) Ceratium furca; 8–10) Ceratium tripos; 11–12) Ceratium lineatum; 13–14) Ceratium cf. teres. The arrow indicates the amplified 270 bp fragment.
