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  • Electronic Resource  (2)
  • ATP synthase  (1)
  • Cyanophora paradoxa  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular evolution 34 (1992), S. 153-162 
    ISSN: 1432-1432
    Keywords: Phylogenetic inference ; Stationarity ; Substitutional Bias ; Compositional bias ; Cyanelle ; Cyanophora paradoxa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Available molecular and biochemical data offer conflicting evidence for the origin of the cyanelle of Cyanophora paradoxa. We show that the similarity of cyanelle and green chloroplast sequences is probably a result of these two lineages independently developing the same pattern of directional nucleotide change (substitutional bias). This finding suggests caution should be exercised in the interpretation of nucleotide sequence analyses that appear to favor the view of a common endosymbiont for the cyanelle and chlorophyll-b-containing chloroplasts. The data and approaches needed to resolve the issue of cyanelle origins are discussed. Our findings also have general implications for phylogenetic inference under conditions where the base compositions (compositional bias) of the sequences analyzed differ.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-5028
    Keywords: wheat ; chloroplast genes ; ATP synthase ; methionine tRNA gene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The nucleotide sequences of the chloroplast genes for the alpha, beta and epsilon subunits of wheat chloroplast ATP synthase have been determined. Open reading frames of 1512 bp, 1494 bp and 411 bp are deduced to code for polypeptides of molecular weights 55201, 53796 and 15200, identified as the alpha, beta and epsilon subunits respectively by homology with the subunits from other sources and by amino acid sequencing of the epsilon subunit. The genes for the beta and epsilon subunits overlap by 4 bp. The gene for methionine tRNA is located 118 bp downstream from the epsilon subunit gene. Comparisons of the deduced amino acid sequences of the alpha and beta subunits with those from other species suggest regions of the proteins involved in adenine nucleotide binding.
    Type of Medium: Electronic Resource
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