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Zoo-FISH experiments with OFE-1 (arrows) and SFO-A (arrowheads) painting probes applied on the metaphase plate of the black arowana Osteoglossum ferreirai (A), silver arowana Osteoglossum bicirrhosum (B); Asian arowana Scleropages formosus that carries the conspicuous heterochromatic block in both (C1) or just one (C2) homologs; the Northern saratoga Scleropages jardinii (D) and Southern saratoga Scleropages leichardti (E). Bar = 5 µm.
