| Literature DB >> 599573 |
Abstract
A method is described for assessing the non-randomness of protein compositions, based on the chi-squared statistic for the differences between the observed numbers of residues of each type and the numbers expected for a random distribution of codons. The analysis indicates that changes in at least 30% of the residues in natural proteins are selected against.Mesh:
Substances:
Year: 1977 PMID: 599573 DOI: 10.1007/bf01764598
Source DB: PubMed Journal: J Mol Evol ISSN: 0022-2844 Impact factor: 2.395