Studies of esterase 6 in Drosophila melanogaster: XI. Modification of esterase 6 activity by unlinked genes
نویسندگان
چکیده
منابع مشابه
Amino acid polymorphisms for esterase-6 in Drosophila melanogaster.
High-resolution electrophoresis has revealed 10 allozymes of esterase-6 (EC 3.1.1.1) in Drosophila melanogaster. The sequences of 13 isolates of the Est6 gene covering all 10 allozymes were obtained and 52 nucleotide differences were found. Sixteen of these cause amino acid replacements, of which three result in charge differences whose size and direction are consistent with the electrophoretic...
متن کاملStudies of esterase 6 in Drosophila melanogaster. XVIII. Biochemical differences between the slow and fast allozymes.
Most natural populations of Drosophila melanogaster are polymorphic for two major electrophoretic variants at the esterase-6 locus. The frequency of the EST 6F allozyme is greatest in populations in warmer latitudes, whereas the EST 6S allozyme is predominant in colder latitudes. Latitudinal clines in electromorph frequencies are found on three continents. Purified preparations of the allozymes...
متن کاملAssociations between restriction site polymorphism and enzyme activity variation for esterase 6 in Drosophila melanogaster.
Thirty-five nucleotide polymorphisms were found in a 21.5-kbp region including the Est6 locus among 42 isoallelic lines extracted from a single natural population of Drosophila melanogaster. The heterozygosity per nucleotide pair was estimated to be 0.010 overall, but was lower in sequences hybridizing to transcripts than in those not hybridizing to transcripts. Eleven of 36 pairwise comparison...
متن کاملMolecular analysis of duplicated esterase genes in Drosophila melanogaster.
Genomic clones containing sequences homologous to an esterase 6 (Est-6) cDNA clone were isolated from a library of Drosophila melanogaster DNA. Comparison of the genomic and cDNA sequences revealed that the Est-6 gene comprises two exons, one of 1,387 bp and one of 248 bp, separated by a short intron of 51 bp. Further sequencing revealed the presence of a tandem duplication of the Est-6 gene (d...
متن کاملStudies of esterase 6 in Drosophila melanogaster. VI. ejaculate competitive abilities of males having null or active alleles.
Recent studies of the function of the polymorphic seminal fluid enzyme, esterase 6, of Drosophila melanogaster suggested that it may act in the process of sperm displacement (Gilbert, Richmond and Sheehan, 1981a). This report examines the competitive ability of ejaculates from males homozygous for null or active alleles of esterase 6 under three experimental conditions that model aspects of sex...
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ژورنال
عنوان ژورنال: Genetical Research
سال: 1982
ISSN: 0016-6723,1469-5073
DOI: 10.1017/s0016672300018991