obsolete horsetail nucleus leading edge true OBSOLETE. The part of the horsetail nucleus where telomeres cluster under the SPB and that leads horsetail movement. The horsetail nucleus is the elongated nucleus which forms during the rapid oscillatory movement at meiotic prophase; characterized in Schizosaccharomyces pombe. This term was made obsolete at the request of PomBase as the concept can be expressed by annotating to a less granular term and using annotation extensions. cellular_component mah GO:0071687 2010-02-22T05:04:40Z