Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 388

The DOI matches its Crossref record; 30 of the 30 references it cites were found in a registry or an index.

The human multidrug resistance (mdr1) gene. cDNA cloning and transcription initiation.

Open access
Ueda, K, Clark, D P, Chen, C J, Roninson, I B, Gottesman, M M, Pastan, I·1987·Journal of Biological Chemistry

Abstract

Multidrug resistance in human KB carcinoma cells selected for resistance to colchicine, vinblastine, or adriamycin results from overexpression, and frequently amplification, of a specific gene (mdr1). Overlapping cDNA clones representing a complete 4.7-kilobase mdr1 transcript have been obtained from multidrug-resistant KB cells. Primer extension and S1 nuclease protection experiments show that two transcripts initiate 136 and 140 bases upstream from the first ATG codon in all human multidrug-resistant cell lines. The mdr1 gene is expressed in human normal kidney cells and HepG2 liver cells as a poly(A)+ RNA which starts from the same sites. Less prominent transcripts were found to initiate 155-180 bases upstream from the first ATG codon in vinblastine- or adriamycin-selected cell lines and 480-630 bases upstream in colchicine-selected cell lines. Southern hybridization analyses with different portions of a full-length cDNA indicate that the human mdr1 gene encompasses at least 70 kilobases of DNA amplified in all highly multidrug-resistant cell lines.

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.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1016/s0021-9258(19)75806-2

Cites

30 of 30 references verified0 citation errors · 0 not checkable

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.

A few free checks a day · papers already verified open instantly · results are public

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

Show all 30 references

Cited by

See all 388

Metadata

Authors
Ueda, K., Clark, D. P., Chen, C. J., Roninson, I. B., Gottesman, M. M., & Pastan, I.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1987-01
Volume
262
Issue
2
Pages
505-508
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1572770561
Cited by
388
References
30
FWCI
8.39
Type
journal article
Language
en
Open access
hybrid

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: The human multidrug resistance (mdr1) gene. cDNA cloning and transcription initiation. https://app.cochat.ai/papers/10.1016/s0021-9258(19)75806-2
The paper
Ueda, K., Clark, D. P., Chen, C. J., Roninson, I. B., Gottesman, M. M., & Pastan, I. (1987). The human multidrug resistance (mdr1) gene. cDNA cloning and transcription initiation. Journal of Biological Chemistry. https://doi.org/10.1016/s0021-9258(19)75806-2

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.