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Science 10 July 1970:
Vol. 169. no. 3941, pp. 190 - 192
DOI: 10.1126/science.169.3941.190
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Articles

Bacterial Flagella: Polarity of Elongation

Suzanne U. Emerson 1, Kiyoteru Tokuyasu 1, and Melvin I. Simon 1

1 Department of Biology, University of California, San Diego, La Jolla 92037

Newly synthesized regions of Bacillus subtilis flagella were labeled with fluorophenylalanine or [3H]leucine. The flagella were then examined for altered gross morphology or by radioautography. Results of both experiments indicate that flagella elongate in vivo by polymerization of flagellin subunits onto the distal end of the filament.


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