Cytoplasmic actin patterns in Physarum as revealed by NBD-phallacidin staining

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Abstract
Fluorescently labeled phallacidin, a F-actin specific drug, was used to demonstrate the morphological variety in the cytoskeletal actin pattern of thin-spread plasmodia of the acellular slime mould Physarum polycephalum. The patterns observed in phallacidin-stained specimens consisted of a polygonal network in the anterior region, and of longitudinal as well as helically twisted fibrils in plasmodial strands of the posterior region. These observations are in complete accordance with our recent results obtained on comparable plasmodia by immunofluorescence microscopy using specific antibodies against actin.

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