Then, after felling a monster, the barbed end
can be used to tear free some precious flesh.
The peripheral actin ultrastructure of the growth cone has also been well characterized as being composed of two distinct structural domains: filopodia containing arrays of uniformly polarized (barbed end
distal) actin filaments, and intervening lamellipodium domains with less polarized filament structure (cf figure 6a; Lewis and Bridgman, 1992).
Organelles isolated from squid axons move towards the barbed ends
of actin filaments (6, 7) at 1.6 [[micro]meter]/s (8) and in either direction on microtubules at 2 [[micro]meter]/s (9).