When nitrogen is low, about 1 in 10 of these bacteria, which grow in long filaments of cells, specialise in fixing nitrogen. (newscientist.com)
SHAPE SHIFTER Candida tropicalis usually grows as a harmless roundish budding yeast (green), but in the presence of two bacteria it stretches into long filaments (brown) that may provoke inflammation in intestines. (sciencenews.org)
The cytoskeleton is mostly woven out of a protein called actin that forms long filaments. (sciencemag.org)