Similar amino acid sequences: chance or common ancestry? - PubMed (original) (raw)
Comparative Study
. 1981 Oct 9;214(4517):149-59.
doi: 10.1126/science.7280687.
- PMID: 7280687
- DOI: 10.1126/science.7280687
Comparative Study
Similar amino acid sequences: chance or common ancestry?
R F Doolittle. Science. 1981.
Abstract
The systemic comparison of every newly determined amino acid sequence with all other known sequences may allow a complete reconstruction of the evolutionary events leading to contemporary proteins. But sometimes the surviving similarities are so vague that even computer-based sequence comparisons procedures are unable to validate relationships. In other cases similar sequences may appear in totally alien proteins as a result of mere chance or, occasionally, by the convergent evolution of sequences with special properties.
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