In cell biology, the spindle apparatus is the cytoskeletal structure of eukaryotic cells that forms during cell division to separate sister chromatids between daughter cells. It is referred to as the mitotic spindle during mitosis, a process that produces genetically identical daughter cells, or the meiotic spindle during meiosis, a process that produces gametes with half the number of chromosomes of the parent cell.
Telophase is the final stage in both meiosis and mitosis in a eukaryotic cell. During telophase, the effects of prophase and prometaphase are reversed. As chromosomes reach the cell poles, a nuclear envelope is re-assembled around each set of chromatids, the nucleoli reappear, and chromosomes begin to decondense back into the expanded chromatin that is present during interphase. The mitotic spindle is disassembled and remaining spindle microtubules are depolymerized. Telophase accounts for approximately 2% of the cell cycle's duration.
Marc Wallace Kirschner is an American cell biologist and biochemist and the founding chair of the Department of Systems Biology at Harvard Medical School. He is known for major discoveries in cell and developmental biology related to the dynamics and function of the cytoskeleton, the regulation of the cell cycle, and the process of signaling in embryos, as well as the evolution of the vertebrate body plan. He is a leader in applying mathematical approaches to biology. He is the John Franklin Enders University Professor at Harvard University. In 2021 he was elected to the American Philosophical Society.
Elaine V. Fuchs is an American cell biologist famous for her work on the biology and molecular mechanisms of mammalian skin and skin diseases, who helped lead the modernization of dermatology. Fuchs pioneered reverse genetics approaches, which assess protein function first and then assess its role in development and disease. In particular, Fuchs researches skin stem cells and their production of hair and skin. She is an investigator at the Howard Hughes Medical Institute and the Rebecca C. Lancefield Professor of Mammalian Cell Biology and Development at The Rockefeller University.
Dynactin is a 23 subunit protein complex that acts as a co-factor for the microtubule motor cytoplasmic dynein-1. It is built around a short filament of actin related protein-1 (Arp1).
Targeting protein for Xklp2 is a protein that in humans is encoded by the TPX2 gene. It is one of the many spindle assembly factors that play a key role in inducing microtubule assembly and growth during M phase.
Keith Burridge is a British researcher and Kenan distinguished Professor at the University of North Carolina at Chapel Hill. His research on focal adhesions includes the discovery of many adhesion proteins including vinculin, talin and paxillin, and ranks him in top 1% of the most cited scientist in the field of molecular biology and genetics. Burridge has published more than 200 peer reviewed articles.
Anthony Arie Hyman is a British scientist and director at the Max Planck Institute of Molecular Cell Biology and Genetics.
Zena Werb was a professor and the Vice Chair of Anatomy at the University of California, San Francisco. She was also the co-leader of the Cancer, Immunity, and Microenvironment Program at the Hellen Diller Family Comprehensive Cancer Center and a member of the Executive Committee of the Sabre-Sandler Asthma Basic Research Center at UCSF. Her research focused on features of the microenvironment surrounding cells, with particular interest in the extracellular matrix and the role of its protease enzymes in cell signaling.
Rong Li is the Director of Mechanobiology Institute, a Singapore Research Center of Excellence, at the National University of Singapore. She is a Distinguished Professor at the National University of Singapore's Department of Biological Sciences and Bloomberg Distinguished Professor of Cell Biology and Chemical & Biomolecular Engineering at the Johns Hopkins School of Medicine and Whiting School of Engineering. She previously served as Director of Center for Cell Dynamics in the Johns Hopkins School of Medicine’s Institute for Basic Biomedical Sciences. She is a leader in understanding cellular asymmetry, division and evolution, and specifically, in how eukaryotic cells establish their distinct morphology and organization in order to carry out their specialized functions.
Amy S. Gladfelter is an American quantitative cell biologist who is interested in understanding fundamental mechanisms of cell organization. She is a Professor of Biology and the Associate Chair for Diversity Initiatives at the University of North Carolina at Chapel Hill, where she investigates cell cycle control and the septin cytoskeleton. She is also affiliated with the Lineberger Comprehensive Cancer Center and is a fellow of the Marine Biological Laboratory in Woods Hole, MA.
Carole LaBonne is a Developmental and Stem Cell Biologist at Northwestern University. She is the Erastus O. Haven Professor of Life Sciences, and Chair of the Department of Molecular Biosciences.
Samara Reck-Peterson is an American cell biologist and biophysicist. She is a Professor of Cellular and Molecular Medicine and Cell and Developmental Biology at the University of California, San Diego and an Investigator of the Howard Hughes Medical Institute. She is known for her contributions to our understanding of how dynein, an exceptionally large motor protein that moves many intracellular cargos, works and is regulated. She developed one of the first systems to produce recombinant dynein and discovered that, unlike other cytoskeletal motors, dynein can take a wide variety of step sizes, forward and back and even sideways. She lives in San Diego, California.
Inke Näthke is a German-British cell biologist. She is Professor of Epithelial Biology at the Department of Cell & Developmental Biology, Interim Dean and Associate Dean for Professional Culture at the School of Life Sciences at the University of Dundee in Scotland. She is known for her work on the role of the adenomatous polyposis coli (APC) protein in colorectal cancer.
Valentina Greco is an Italian-born biologist who teaches at the Yale School of Medicine as the Carolyn Walch Slayman Professor of Genetics and is an Associate Professor in the Cell Biology and Dermatology departments. Her research focuses on the role of skin stem cells in tissue regeneration.
Xenopus egg extract is a lysate that is prepared by crushing the eggs of the African clawed frog Xenopus laevis. It offers a powerful cell-free system for studying various cell biological processes, including cell cycle progression, nuclear transport, DNA replication and chromosome segregation. It is also called Xenopus egg cell-free system or Xenopus egg cell-free extract.
Denise Johnson Montell is an American biologist who is the Duggan Professor of Molecular, Cellular, and Developmental Biology at the University of California, Santa Barbara. Her research considers the oogenesis process in Drosophila and border cell migration. She has served as president of the Genetics Society of America and was elected to the National Academy of Sciences in 2021.
David G. Drubin is an American biologist, academic, and researcher. He is a Distinguished Professor of Cell and Developmental Biology at the University of California, Berkeley where he holds the Ernette Comby Chair in Microbiology.
Ahna Renee Skop is an American geneticist, artist, and a professor at the University of Wisconsin–Madison. She is known for her research on the mechanisms underlying asymmetric cell division, particularly the importance of the midbody in this process.
Suzanne Ruth Pfeffer is an American neuroscientist who is a professor at Stanford University. Her research investigates the molecular mechanisms that cause receptors to be transported between membrane compartments in cells, and she is an expert in Rab GTPases and the molecular basis of inherited Parkinson's disease. She is a Fellow of the American Association for the Advancement of Science, American Academy of Arts and Sciences and the American Society for Cell Biology.
