Through mutational analysis in Drosophila, we have identified the gene multiple asters (mast), that encodes a new 165 kDa protein. mast mutant neuroblasts are highly polyploid and show severe mitotic abnormalities including the formation of mono- and multi-polar spindles organised by an irregular number of MTOCs of abnormal size and shape. The mast gene product is evolutionary conserved since homologues were id...
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