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In early eukaryotes, the microtubule system was engaged in mitosis, intracellular transport, and flagellum-based motility. In the plant lineage, the evolution of a multicellular body involved the conservation of some core functions, the loss of others, and the elaboration of new microtubule functions associated with the multicellular plant habit. This diversification is reflected by the presence of...
Increasingly, the attention of developmental biologists is being drawn from genes and their products towards cells, from processes mediated by linear pathways in which one protein regulates the activity of another to events that rely on multimolecular machines. Some components of these machines are partially redundant, and some have essential functions in general cellular processes. These observations...
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