J Myles Axton

Learn More
Drosophila has four loci encoding type 1 protein serine/threonine phosphatases (PP1s). Here we describe mutations in one of these genes, at 87B on chromosome 3. Mutants die at the larval-pupal boundary with little or no imaginal cell proliferation. Neuroblasts are delayed in progress through mitosis and show defective spindle organization, abnormal sister(More)
At the transition from meiosis to cleavage mitoses, Drosophila requires the cell cycle regulators encoded by the genes, giant nuclei (gnu), plutonium (plu) and pan gu (png). Embryos lacking Gnu protein undergo DNA replication and centrosome proliferation without chromosome condensation or mitotic segregation. We have identified the gnu gene encoding a novel(More)
Many aspects of the mitotic cycle can take place independently in syncytial Drosophila embryos. Embryos from females homozygous for the mutation gnu undergo rounds of DNA synthesis without nuclear division to produce giant nuclei, and at the same time show many cycles of centrosome replication (Freeman et al. 1986). S phase can be inhibited in wild-type(More)
  • 1