The DOI matches its Crossref record; 2 of the 2 references it cites were found in a registry or an index.
Molecular Cloning of Two Types of GAP Complementary DNA from Human Placenta
Abstract
The ras p21 GTPase-activating protein (GAP) was purified from human placental tissue. Internal amino acid sequence was obtained from this 120,000-dalton protein and, by means of this sequence, two types of complementary DNA clones were isolated and characterized. One type encoded GAP with a predicted molecular mass of 116,000 daltons and 96% identity with bovine GAP. The messenger RNA of this GAP was detected in human lung, brain, liver, leukocytes, and placenta. The second type appeared to be generated by a differential splicing mechanism and encoded a novel form of GAP with a predicted molecular mass of 100,400 daltons. This protein lacks the hydrophobic amino terminus characteristic of the larger species, but retains GAP activity. The messenger RNA of this type was abundantly expressed in placenta and in several human cell lines, but not in adult tissues.
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
Primer-Directed Enzymatic Amplification of DNA with a Thermostable DNA Polymerase
Saiki, R. K., Gelfand, D. H., Stoffel, S., Scharf, S. J., Higuchi, R., Horn, G. T., Mullis, K. B., & Erlich, H. A. (1988) · Science · doi:10.1126/science.2448875 · Cited by 17,719
A Cytoplasmic Protein Stimulates Normal N- ras p21 GTPase, But Does Not Affect Oncogenic Mutants
Trahey, M., & McCormick, F. (1987) · Science · doi:10.1126/science.2821624 · Cited by 1,211
Self-citation
Cited by
RAS oncogenes: the first 30 years
Malumbres, M., & Barbacid, M. (2003) · Nature Reviews Cancer · doi:10.1038/nrc1097 · Cited by 1,902
Ras oncogenes: split personalities
Karnoub, A. E., & Weinberg, R. A. (2008) · Nature Reviews Molecular Cell Biology · doi:10.1038/nrm2438 · Cited by 1,467
The neurofibromatosis type 1 gene encodes a protein related to GAP
Xu, G., O'Connell, P., Viskochil, D., Cawthon, R., Robertson, M., Culver, M., Dunn, D., Stevens, J., Gesteland, R., White, R., et al. (1990) · Cell · doi:10.1016/0092-8674(90)90024-9 · Cited by 1,095
The NF1 locus encodes a protein functionally related to mammalian GAP and yeast IRA proteins.
Ballester, R., Marchuk, D., Boguski, M., Saulino, A., Letcher, R., Wigler, M., & Collins, F. (1990) · Cell · doi:10.1016/0092-8674(90)90151-4 · Cited by 847
Phosphorylation of GAP and GAP-associated proteins by transforming and mitogenic tyrosine kinases
Ellis, C., Moran, M., McCormick, F., & Pawson, T. (1990) · Nature · doi:10.1038/343377a0 · Cited by 746
Self-citation
Metadata
- Authors
- Trahey, M., Wong, G., Halenbeck, R., Rubinfeld, B., Martin, G. A., Ladner, M., Long, C. M., Crosier, W. J., Watt, K., Koths, K., & McCormick, F.
- Venue
- Science
- Published
- 1988-12-23
- Volume
- 242
- Issue
- 4886
- Pages
- 1697-1700
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W1979646488
- Cited by
- 468
- References
- 2
- FWCI
- 15.75
- Type
- journal article
- Language
- en
- Open access
- closed
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: Molecular Cloning of Two Types of GAP Complementary DNA from Human Placenta. https://app.cochat.ai/papers/10.1126/science.3201259
- The paper
- Trahey, M., Wong, G., Halenbeck, R., Rubinfeld, B., Martin, G. A., Ladner, M., Long, C. M., Crosier, W. J., Watt, K., Koths, K., & McCormick, F. (1988). Molecular Cloning of Two Types of GAP Complementary DNA from Human Placenta. Science. https://doi.org/10.1126/science.3201259
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.