Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 674

The DOI matches its Crossref record; 2 of the 2 references it cites were found in a registry or an index.

Isolation of a heparan sulfate-containing proteoglycan from basement membrane.

Open access
Hassell, J R, Robey, P G, Barrach, H J, Wilczek, J, Rennard, S I, Martin, G R·1980·Proceedings of the National Academy of Sciences

Abstract

We have isolated a unique, basement membrane proteoglycan from the Engelbreth-Holm-Swarm (EHS) sarcoma. This proteoglycan, estimated to be 0.75 X 10(6) daltons, was found to contain about equal amounts of protein and covalently linked heparan sulfate. Antibody prepared against this proteoglycan reacts with the basement membrane matrix in the tumor and with the basement membranes in skin, kidney, and cornea. These studies indicate that the heparan sulfate proteoglycan is a normal constituent of basement membranes that presumably plays an important role in the organization of basement membrane components and that also may determine the permeability of basement membranes to acidic molecules.

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 · 10.1073/pnas.77.8.4494

Cites

2 of 2 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 2 references

Cited by

See all 674

Metadata

Authors
Hassell, J. R., Robey, P. G., Barrach, H. J., Wilczek, J., Rennard, S. I., & Martin, G. R.
Venue
Proceedings of the National Academy of Sciences
Published
1980-08
Volume
77
Issue
8
Pages
4494-4498
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W1980617596
Cited by
674
References
2
FWCI
19.07
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: Isolation of a heparan sulfate-containing proteoglycan from basement membrane. https://app.cochat.ai/papers/10.1073/pnas.77.8.4494
The paper
Hassell, J. R., Robey, P. G., Barrach, H. J., Wilczek, J., Rennard, S. I., & Martin, G. R. (1980). Isolation of a heparan sulfate-containing proteoglycan from basement membrane. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.77.8.4494

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.