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Science 15 May 1970:
Vol. 168. no. 3933, pp. 845 - 847
DOI: 10.1126/science.168.3933.845
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Articles

On the Apparent Homology of Actin and Tubulin

R. E. Stephens 1

1 Department of Biology, Brandeis University, Waltham, Massachusetts, and The Marine Biological Laboratory, Woods Hole, Massachusetts 02543

Muscle actin and ciliary A-tubulin from Pecten irradians have molecular weights of 46,000 and 59,000, respectively, as measured by sodium lauryl sulfate—polyacrylamide-gel electrophoresis. Tryptic and chymotryptic peptides obtained from these proteins are very dissimilar, indicating that there is little significant homology.

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