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  • Title: Analysis of three separate probes suggests the absence of endocytosis in Neurospora crassa hyphae.
    Author: Torralba S, Heath IB.
    Journal: Fungal Genet Biol; 2002 Dec; 37(3):221-32. PubMed ID: 12431457.
    Abstract:
    Reports of the existence of endocytosis in filamentous fungi have been conflicting and inconclusive. For this reason, we have tested three independent markers in Neurospora crassa: the electron opaque marker lanthanum (La) and the fluorescent probes Lucifer yellow (LY) and FM4-64. Both La and LY were endocytosed by Saccharomyces cerevisiae cells, which were used as positive controls for endocytosis, but the probes did not accumulate in N. crassa hyphae. Only FM4-64 became internalized into N. crassa hyphae, but it induced abnormal changes in membrane systems and its internalization could be explained by mechanisms other than endocytosis. Together, our results suggest that endocytosis does not occur in N. crassa hyphae and question whether the styryl dyes do in fact reliably report normal endocytosis in filamentous fungi.
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