Molecular Biology and Evolution, Vol 5, 433-441, Copyright © 1988 by Society for Molecular Biology and Evolution
M Aguade
A 1.6-kb fragment encompassing the rp49 gene, which codes for a ribosomal
protein, has been cloned and sequenced in Drosophila subobscura. The rp49
coding region has accumulated 46 nucleotide differences out of 402 bp since
D. subobscura diverged from D. melanogaster. Forty-three percent of the
effectively silent sites have changed since both species diverged. Both
silent and replacement differences are distributed at random between the
two exons of the gene. The frequency of silent differences in exons does
not differ from that observed in the 5' leader sequence and in the intron.
The frequency of silent differences in exon and intron sites is much
greater than the number of amino acid replacement differences. This
observation indicates strong purifying selection against amino acid
replacements.
ORIGINAL ARTICLE
Nucleotide sequence comparison of the rp49 gene region between Drosophila subobscura and D. melanogaster
Department de Genetica, Facultat de Biologia, Universitat de Barcelona, Spain.
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