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Australia: The Land Where Time Began |
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Slime Moulds – Dictyostelium, How Blebs and Pseudopodia Cooperate During Chemotaxis In this paper Tyson et
al. show that in
Dictyostelium, blebs, which are extensions of the plasma membrane that
are pressure-driven, form preferentially in concave regions of the
plasma membrane when the organism is migrating. They propose that the
underlying physical reason is membrane tension, which provides an
outward force at the concavities. Continued polymerisation of actin can
transform blebs into pseudopods and pseudopods can trigger blebs on
their flanks. Therefore, during chemotaxis the 2 forms of protrusion can
cooperate.
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Author: M.H.Monroe Email: admin@austhrutime.com Sources & Further reading |