Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 1997 Apr 7;137(1):155–167. doi: 10.1083/jcb.137.1.155

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).

PMC Copyright notice

Video sequences showing Listeria-induced pseudopodium behavior in PtK2 cells (a) and macrophages (b). Time is indicated in min. (a) One bacterium is already in a pseudopodium (1) at time 0′, and the second (2) is in bulk cytoplasm at the head of a comet tail. The pseudopodium (1) gyrates actively for several minutes, and then reenters the main body of the cell at around 5′, forming a typical comet tail (6′ and 7′). The second bacterium begins to form a pseudopodium at 2′, which then exists from 3′ to 5′, after which the bacterium reenters the cell (at 6′), immediately forming a comet (7′). (b) Two pseudopodia (1 and 2) are shown that have already extended away from the macrophage cell body (bottom righthand corner) and continue to move during the sequence, being tethered to the cell by a thin strand. Conditions: (a) phase contrast; (b) Normarski interference contrast. Bars: (a and b) 4.5 μm.