Click the green plus () icon next to the Reference Files section header and choose Reference sequenceCytoband from the Library type drop-down list in the Add reference sequence dialog (Figure 1). Alternatively, click the Add library file button and choose Reference sequence from the Library type drop-down list. If a reference sequence is already associated with an assembly, Cytoband will be the only option available in the Add genome dialog and will not appear in a drop-down list (Figure 1).

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