Synaptonaemal complexes of Xenopus laevis
Article Abstract:
The whole mount spreading method was used to characterize the synaptonaemal complexes (SC) of Xenopus laevis. A SC-based karyotype was constructed, as the SCs of X. laevis were very similar to that of other Xenopus species. SC complement length was found to be longer in oocytes than in spermatocytes, as in humans. A high degree of centromere mismatching was observed. Polarization of nuclei at zygotene was seen with a centriole pair being visible at zygotene and pachytene. The ends of SCs were thickened at zygotene at points presumed to be sites of attachment to the nuclear membrane. No classical leptotene stage was observed. Homology to other animal SCs was also seen.
Publication Name: The Journal of Heredity
Subject: Biological sciences
ISSN: 0022-1503
Year: 1992
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Is the synaptonemal complex a disjunction machine?
Article Abstract:
The role of the synaptonemal complex (SC) and chiasma formation during the meiosis is the subject of much research. Although crossing over of the chromosomes is necessary it in itself is insufficient to maintain the chiasma until anaphase I. The chiasma is probably maintained by a binding substance formed by the SC which is present only at the cross-over points. Crossing over starts before synapsis and is completed before, during or after the breakdown of SC. The lateral elements of SC bind sister chromatids during pachytene and sometimes even before pachytene.
Publication Name: The Journal of Heredity
Subject: Biological sciences
ISSN: 0022-1503
Year: 1995
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Localization of Repetitive DNA Sequences on in vitro Xenopus laevis Chromosomes by Primed in situ Labeling (PRINS)
Article Abstract:
Primed in situ labeling (PRINS) as a tool for localizing repetitive DNA sequences is verified, using Xenopus laevis as an example.
Publication Name: The Journal of Heredity
Subject: Biological sciences
ISSN: 0022-1503
Year: 2005
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