The presence of F-actin in Euglena cells was revealed by the use of fluorescent delta-aminophalloin. In normal cells F-actin forms a web of fine filaments at the cell periphery and around the nucleus. In Cr-poisoned cells this pattern is completely altered, and F-actin is visible as a single strongly fluorescent band of various shape and location.
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Bassi et al. (1984) studied this question.
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