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西亚试剂:Drosophila Muller F Elements Maintain a Distinct Set of Gen

发布时间:2025-05-25

The Muller F element (4.2 Mb, ~80 protein-coding genes) is an unusual autosome of Drosophila melanogaster; it is mostly heterochromatic with a low recombination rate. To investigate how these properties impact the evolution of repeats and genes, we manually improved the sequence and annotated the genes on the D. erecta, D. mojavensis, and D. grimshawi F elements and euchromatic domains from the Muller D element. We find that F elements have higher transposon density (25%–50%) than euchromatic reference regions (3%–11%). Among the F elements, D. grimshawi has the lowest transposon density (particularly DINE-1: 2% versus 11%–27%). F element genes have larger coding spans, more coding exons, larger introns, and lower codon bias. Comparison of the Effective Number of Codons with the Codon Adaptation Index shows that, in contrast to the other species

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