Holding chromatids together to ensure they go their separate ways

BioEssays : News and Reviews in Molecular, Cellular and Developmental Biology
Sharon E Bickel, T L Orr-Weaver

Abstract

Association between sister chromatids is essential for their attachment and segregation to opposite poles of the spindle in mitosis and meiosis II. Sister-chromatid cohesion is also likely to be involved in linking homologous chromosomes together in meiosis I. Cytological observations provide evidence that attachment between sister chromatids is different in meiosis and mitosis and suggest that cohesion between the chromatid arms may differ mechanistically from that at the centromere. The physical nature of cohesion is addressed, and proteins that are candidates for holding sister chromatids together are discussed. Dissolution of sister-chromatid cohesion must be regulated precisely, and potential mechanisms to release cohesion are presented.

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Mar 29, 2000·Molecular Reproduction and Development·J LeeR M Moor
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