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The Spindle Assembly Checkpoint

The Spindle Assembly Checkpoint

The spindle assembly checkpoint is a molecular surveillance mechanism ensuring the fidelity of chromosome segregation during anaphase. The checkpoint monitors the completion of all the prerequisite steps before chromosome segregation to determine whether the segregation process should proceed or be delayed.
Many proteins function together to control the spindle assembly checkpoint. Mutations affecting these proteins may allow cells to proceed into anaphase prematurely, resulting in the...

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Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...

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Related Experiment Video

Updated: Jan 30, 2026

Evaluation of the Spindle Assembly Checkpoint Integrity in Mouse Oocytes

Evaluation of the Spindle Assembly Checkpoint Integrity in Mouse Oocytes

Published on: September 13, 2022

A new checkpoint in lupus

George C Tsokos¹

¹Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Mass.

The Journal of Allergy and Clinical Immunology

|January 15, 2019

Summary

No abstract available in PubMed .

Keywords:

Autoantibodies autoimmunity checkpoint control lupus

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