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Science 17 September 2004:
Vol. 305. no. 5691, p. 1673
DOI: 10.1126/science.305.5691.1673n
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This Week in Science

When cells move on a substrate, their leading edge protrudes forming a lamellipodium. Actin assembly is known to play a key role in promoting cell motility. Ponti et al. (p. 1782) examined the detailed dynamics of actin at the leading edge using fluorescent speckle microscopy. They observed two independent populations of actin with overlapping distributions that possessed distinctive dynamic properties and that appeared to promote different aspects of leading edge motility.




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