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Significance of the amino acid composition of proteins I Composition of hemoglobins and myoglobins in relation to their structure, function and evolution


J Theor Biol: 227-241
Significance of the amino acid composition of proteins I Composition of hemoglobins and myoglobins in relation to their structure, function and evolution
From considerations of polar, non-polar and hydroxy amino acid contents for several hemoglobins and myoglobins, it was possible to point out composition differences that clearly differentiated the myoglobin group from the hemoglobin group. Within the same hemoprotein group, constant" and characteristic composition tendencies could be pointed out that were typical of a particular class in the evolution ladder. Therefore, hemoglobins from the pisces were distinct in their composition characteristics from mammalian hemoglobins. Similar distinctions were also found in myoglobins. Composition characteristics were discussed in relation to structure, function and evolution of the hemoprotein groups. From this treatment it was deduced that the [beta]-chaim (rather than the [alpha]-chain) represents the primitive chain. Amino acid composition characteristics of hemoglobin in the order primates revealed certain tendencies which could be correlated with the phylogenetic classification and the recent amino acid sequences reported by others.


Accession: 025454230

PMID: 5965488



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