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Science 26 December 1975:
Vol. 190. no. 4221, pp. 1306 - 1307
DOI: 10.1126/science.1198114
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Articles

Science, Vol 190, Issue 4221, 1306-1307
Copyright © 1975 by American Association for the Advancement of Science

articles

Transferrin: internal homology in the amino acid sequence

RT MacGillivray and K Brew

Two regions of the primary structure of human serum transferrin, of 87 and 57 residues, are reported. When these are suitably aligned by placing two gaps, 40 percent of the amino acids in corresponding positions are identical. This indicates that the doubling of an ancestral structural gene occurred during the evolution of the transferrins.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)