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HBB allele frequency data visualization in FINDbase database. (A) The present query involves all HBB gene variants with an allele frequency between 19.96 and 30.59%. Query returns 30 records sorted by frequency. (B) The user can zoom in to each record (red box) for details [this record involves the HBB:c.93-21G>A allele frequency in the Bulgarian population (24.75%), documented in the data entry displayed in the list on the right (see also 11)].
