Claim · model-written summary
Maize knob and centromeric repeat blocks are interrupted by other repeats.
- Outcome
- blocks of tandemly arranged repeating unitse0
Zea maysNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“blocks of tandemly arranged repeating units are interrupted by insertions of other repeated DNA sequences”
t0“maize”
Title
Complex structure of knobs and centromeric regions in maize chromosomes.
E V Ananiev; R L Phillips; H W Rines PubMed 2000
Other claims from this paper (13)
- Observation TR1 knob repeats can form fold-back DNA segments.
- Observation CentC was identified as a centromeric tandem repeat family.
- Observation Inserted sequences are mainly full-size retrotransposable elements.
- Observation Certain retrotransposable elements preferentially associate with knobs or centromeres.
- Observation Retrotransposable elements preferentially integrate at hot spots of the 180-bp repeat.
- Observation CentC, TR1 and 180-bp repeats occur on each tested maize chromosome.
- Observation Repeat copy number varies significantly from about 100 to 25,000.
- Observation Maize chromosomes vary in centromeric repeat size.
- Observation Maize chromosomes vary in knob size and composition.
- Observation Maize knobs contain 180-bp repeats, TR1 repeats, or both.
- Observation Repeat elements also form micro clusters detectable only by in situ hybridization.
- Mechanism Maize knobs may be considered megatransposable elements.
- Mechanism Interspersed retrotransposable elements and tandem repeats may be a basic feature of eukaryotic heterochromatin organization.