The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
Sequence analysis of 28S ribosomal DNA from the amphibian Xenopus laevis
Open accessAbstract
We have determined the complete nucleotide sequence of Xenopus laevis 28S rDNA (4110 bp). In order to locate evolutionarily conserved regions within rDNA, we compared the Xenopus 28S sequence to homologous rDNA sequences from yeast, Physarum, and E. coli. Numerous regions of sequence homology are dispersed throughout the entire length of rDNA from all four organisms. These conserved regions have a higher A + T base composition than the remainder of the rDNA. The Xenopus 28S rDNA has nine major areas of sequence inserted when compared to E. coli 23S rDNA. The total base composition of these inserts in Xenopus is 83% G + C, and is generally responsible for the high (66%) G + C content of Xenopus 28S rDNA as a whole. Although the length of the inserted sequences varies, the inserts are found in the same relative positions in yeast 26S, Physarum 26S, and Xenopus 28S rDNAs. In one insert there are 25 bases completely conserved between the various eukaryotes, suggesting that this area is important for eukaryotic ribosomes. The other inserts differ in sequence between species and may or may not play a functional role.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Evolution of the genetic apparatus
Orgel, L. E. (1968) · Journal of Molecular Biology · doi:10.1016/0022-2836(68)90393-8 · Cited by 996
Cited by
The Complete Atomic Structure of the Large Ribosomal Subunit at 2.4 Å Resolution
Ban, N., Nissen, P., Hansen, J., Moore, P. B., & Steitz, T. A. (2000) · Science · doi:10.1126/science.289.5481.905 · Cited by 3,327
Ribosomal DNA: Molecular Evolution and Phylogenetic Inference
Hillis, D. M., & Dixon, M. T. (1991) · The Quarterly Review of Biology · doi:10.1086/417338 · Cited by 2,573
Clary, D. O., & Wolstenholme, D. R. (1985) · Journal of Molecular Evolution · doi:10.1007/bf02099755 · Cited by 1,519
The Numerous Modified Nucleotides in Eukaryotic Ribosomal RNA
Maden, B. E. H. (1990) · Progress in Nucleic Acid Research and Molecular Biology · doi:10.1016/s0079-6603(08)60629-7 · Cited by 379
History of the ribosome and the origin of translation
Petrov, A. S., Gulen, B., Norris, A. M., Kovacs, N. A., Bernier, C. R., Lanier, K. A., Fox, G. E., Harvey, S. C., Wartell, R. M., Hud, N. V., et al. (2015) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1509761112 · Cited by 290
Metadata
- Authors
- Ware, V. C., Tague, B. W., Graham Clark, C., Gourse, R. L., Brand, R. C., & Gerbi, S. A.
- Venue
- Nucleic Acids Research
- Publisher
- Oxford University Press (OUP)
- Published
- 1983
- Volume
- 11
- Issue
- 22
- Pages
- 7795-7817
- ISSN
- 0305-1048 (ISSN-L)
- 1362-4962
- OpenAlex
- W1979381429
- Cited by
- 161
- References
- 1
- FWCI
- 5.98
- Type
- journal article
- Language
- en
- Open access
- green
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Sequence analysis of 28S ribosomal DNA from the amphibian Xenopus laevis. https://app.cochat.ai/papers/10.1093/nar/11.22.7795
- The paper
- Ware, V. C., Tague, B. W., Graham Clark, C., Gourse, R. L., Brand, R. C., & Gerbi, S. A. (1983). Sequence analysis of 28S ribosomal DNA from the amphibian Xenopus laevis. Nucleic Acids Research. https://doi.org/10.1093/nar/11.22.7795
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.