EOG8KH58B GO:0000922 25/89 spindle pole cellular_component "Either of the ends of a spindle, where spindle microtubules are organized; usually contains a microtubule organizing center and accessory molecules, spindle microtubules and astral microtubules." [GOC:clt] EOG8KH58B GO:0000226 24/89 microtubule cytoskeleton organization biological_process "A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of cytoskeletal structures comprising microtubules and their associated proteins." [GOC:mah] EOG8KH58B GO:0005815 24/89 microtubule organizing center cellular_component "An intracellular structure that can catalyze gamma-tubulin-dependent microtubule nucleation and that can anchor microtubules by interacting with their minus ends, plus ends or sides." [GOC:vw, http://en.wikipedia.org/wiki/Microtubule_organizing_center, ISBN:0815316194, PMID:17072892, PMID:17245416] EOG8KH58B GO:0007020 1/89 microtubule nucleation biological_process "The process in which tubulin alpha-beta heterodimers begin aggregation to form an oligomeric tubulin structure (a microtubule seed). Microtubule nucleation is the initiating step in the formation of a microtubule in the absence of any existing microtubules ('de novo' microtubule formation)." [GOC:go_curators, ISBN:0815316194, PMID:12517712] EOG8KH58B GO:0005874 1/89 microtubule cellular_component "Any of the long, generally straight, hollow tubes of internal diameter 12-15 nm and external diameter 24 nm found in a wide variety of eukaryotic cells; each consists (usually) of 13 protofilaments of polymeric tubulin, staggered in such a manner that the tubulin monomers are arranged in a helical pattern on the microtubular surface, and with the alpha/beta axes of the tubulin subunits parallel to the long axis of the tubule; exist in equilibrium with pool of tubulin monomers and can be rapidly assembled or disassembled in response to physiological stimuli; concerned with force generation, e.g. in the spindle." [ISBN:0879693568] EOG8KH58B GO:0051298 1/89 centrosome duplication biological_process "The replication of a centrosome, a structure comprised of a pair of centrioles and peri-centriolar material from which a microtubule spindle apparatus is organized." [GOC:ai] EOG8KH58B GO:0008274 1/89 gamma-tubulin ring complex cellular_component "A multiprotein complex composed of gamma-tubulin and other non-tubulin proteins that forms a flexible open ring structure thought to be the unit of nucleation at the minus end of a microtubule." [GOC:clt, PMID:12134075] EOG8KH58B GO:0051297 1/89 centrosome organization biological_process "A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of a centrosome, a structure comprised of a pair of centrioles and peri-centriolar material from which a microtubule spindle apparatus is organized." [GOC:ai, GOC:dph, GOC:jl, GOC:mah] EOG8KH58B GO:0045450 1/89 bicoid mRNA localization biological_process "Any process in which bicoid mRNA is transported to and maintained within the oocyte as part of the specification of the anterior/posterior axis." [GOC:go_curators] EOG8KH58B GO:0007112 1/89 male meiosis cytokinesis biological_process "A cell cycle process that occurs as part of the male meiotic cell cycle and results in the division of the cytoplasm of a cell to produce two daughter cells." [GOC:ai] EOG8KH58B GO:0007067 1/89 mitotic nuclear division biological_process "A cell cycle process comprising the steps by which the nucleus of a eukaryotic cell divides; the process involves condensation of chromosomal DNA into a highly compacted form. Canonically, mitosis produces two daughter nuclei whose chromosome complement is identical to that of the mother cell." [GOC:dph, GOC:ma, GOC:mah, ISBN:0198547684] EOG8KH58B GO:0007052 1/89 mitotic spindle organization biological_process "A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of the microtubule spindle during a mitotic cell cycle." [GOC:mah] EOG8KH58B GO:0005200 1/89 structural constituent of cytoskeleton molecular_function "The action of a molecule that contributes to the structural integrity of a cytoskeletal structure." [GOC:mah] EOG8KH58B GO:0007058 1/89 spindle assembly involved in female meiosis II biological_process "The aggregation, arrangement and bonding together of a set of components to form the spindle during meiosis II of a meiotic cell cycle in females. An example of this is found in Drosophila melanogaster." [GOC:mah]