The APC is dispensable for first meiotic anaphase in Xenopus oocytes

  • Peter M
  • Castro A
  • Lorca T
 et al. 
  • 32


    Mendeley users who have this article in their library.
  • 122


    Citations of this article.


Here we show that segregation of homologous chromosomes and that of sister chromatids are differentially regulated in Xenopus and possibly in other higher eukaryotes. Upon hormonal stimulation, Xenopus oocytes microinjected with antibodies against the anaphase-promoting complex (APC) activator Fizzy or the APC core subunit Cdc27, or with the checkpoint protein Mad2, a destruction-box peptide or methylated ubiquitin, readily progress through the first meiotic cell cycle and arrest at second meiotic metaphase. However, they fail to segregate sister chromatids and remain arrested at second meiotic metaphase when electrically stimulated or when treated with ionophore A34187, two treatments that mimic fertilization and readily induce chromatid segregation in control oocytes. Thus, APC is required for second meiotic anaphase but not for first meiotic anaphase.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • M. Peter

  • A. Castro

  • T. Lorca

  • C. Le Peuch

  • L. Magnaghi-Jaulin

  • M. Dorée

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free