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The Cell Cycle Control System01:28

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The cell cycle regulation directs how a cell proceeds from one phase to the next and begins mitosis. The cell cycle control system includes intracellular regulatory molecules and external triggers. They provide "stop" or "advance" signals and operate at specific cell cycle stages termed checkpoints to ensure that a particular process is completed before the cell advances to the next phase.
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The cell cycle is an organized set of events that leads the cell to divide into two daughter cells, each containing chromosomes identical to the parent cell. It is the cell cycle that leads to the formation of an entire organism from a single-cell zygote. Besides, cell division also functions in the renewal or repair of tissues in adult multicellular eukaryotes. For example, in the bone marrow, the stem cells divide to form new blood cells. Although essential for several functions, cell...
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Positive Regulator Molecules02:39

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Mitotic cell division results in daughter cells that exactly resemble the parent cell. However, errors in the DNA replication or distribution of genetic material may lead to genetic mutations that may be passed down to every new cell formed from the resulting abnormal cell. Propagation of such mutant cells is restricted through checkpoint mechanisms present at different stages of the cell cycle. These checkpoints involve regulator molecules that either promote or demote cell cycle events.
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Several external and internal factors influence the initiation and inhibition of cell division. For instance, the death of nearby cells or the release of human growth hormone (hGH) promotes cell division. In contrast, lack of hGH or crowding of cells can inhibit cell division.
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Manipulation and Analysis of Cell Cycle-Dependent Processes in Budding Yeast
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Model Organisms for Studying the Cell Cycle.

Zhaohua Tang1

  • 1W.M. Keck Science Center, The Claremont Colleges, 925 North Mills Avenue, Claremont, CA, 91711, USA, ztang@kecksci.claremont.edu.

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Summary
This summary is machine-generated.

Cell cycle regulation is crucial for life, with diverse model organisms revealing universal control principles. New technologies enable unprecedented cross-species comparisons for deeper insights into cell division.

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Area of Science:

  • Cell Biology
  • Genetics
  • Developmental Biology

Background:

  • Cell cycle regulation is a fundamental biological process conserved across all life forms.
  • Research in diverse model organisms has uncovered universal principles governing cell division.
  • Understanding cell cycle control is essential for addressing complex biological questions.

Purpose of the Study:

  • To review the contributions of various model organisms to understanding eukaryotic cell cycle regulation.
  • To highlight how technological advancements are refining the concept of model organisms.
  • To emphasize the impact of new technologies on comparative studies of cell division.

Main Methods:

  • Comparative analysis of distinct features of model organisms used in cell cycle studies.
  • Historical perspective on breakthroughs in cell cycle control research.
  • Integration of genomics, proteomics, and systems biology approaches.

Main Results:

  • Diverse model organisms have provided critical insights into conserved cell cycle mechanisms.
  • Technological advancements are fostering interdisciplinary research and novel model organism development.
  • New technologies allow for broad evolutionary comparisons of cell division processes.

Conclusions:

  • A comprehensive understanding of cell cycle regulation is enhanced by integrating diverse model organism research and advanced technologies.
  • Modern approaches facilitate unprecedented cross-species comparisons, deepening insights into cell division.
  • The field is moving towards integrated research, leveraging new technologies for a unified understanding of the cell cycle.