| pubmed-article:6426460 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:6426460 | lifeskim:mentions | umls-concept:C0009333 | lld:lifeskim |
| pubmed-article:6426460 | pubmed:issue | 3 | lld:pubmed |
| pubmed-article:6426460 | pubmed:dateCreated | 1984-6-8 | lld:pubmed |
| pubmed-article:6426460 | pubmed:abstractText | Type IV collagen could not be extracted from human placenta using 6M-urea containing 10mM-dithiothreitol, indicating that the type IV molecule is stabilized within the basement membrane by covalent cross-links. However, various forms of type IV collagen molecule were extractable by means of increasingly severe proteolytic conditions. Type IV collagen tetramers ('spiders') lacking only the C-terminal globular region (NC1) were further digested to the 'long-form' 7S fragment and an assortment of helical rod-like molecules derived from the 'leg' region. These molecules were separated by salt fractionation and examined by rotary-shadowing electron microscopy. Isolation of these fractions from placenta which had been reduced with NaB3H4 revealed that both the 7S (N-terminal) and C-terminal regions contained significant proportions of reducible lysine-derived cross-links. These cross-links were shown to be exclusively the stable oxo-imine hydroxylysino-5-oxonorleucine. The number of the cross-links per molecule was significantly lower than might be expected in order to fully stabilize the molecule. These results suggest that the keto-imine cross-links in type IV collagen have been stabilized in part by conversion into an unknown non-reducible form, although a sensitive immunoassay failed to show the presence of any pyridinoline. Comparison with the fibrous collagen from placenta suggested that the rate of this conversion is much greater in basement-membrane collagen. | lld:pubmed |
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| pubmed-article:6426460 | pubmed:language | eng | lld:pubmed |
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| pubmed-article:6426460 | pubmed:citationSubset | IM | lld:pubmed |
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| pubmed-article:6426460 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:6426460 | pubmed:month | Mar | lld:pubmed |
| pubmed-article:6426460 | pubmed:issn | 0264-6021 | lld:pubmed |
| pubmed-article:6426460 | pubmed:author | pubmed-author:BaileyA JAJ | lld:pubmed |
| pubmed-article:6426460 | pubmed:author | pubmed-author:LightNN | lld:pubmed |
| pubmed-article:6426460 | pubmed:author | pubmed-author:SimsT JTJ | lld:pubmed |
| pubmed-article:6426460 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:6426460 | pubmed:day | 15 | lld:pubmed |
| pubmed-article:6426460 | pubmed:volume | 218 | lld:pubmed |
| pubmed-article:6426460 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:6426460 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:6426460 | pubmed:pagination | 713-23 | lld:pubmed |
| pubmed-article:6426460 | pubmed:dateRevised | 2009-11-18 | lld:pubmed |
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| pubmed-article:6426460 | pubmed:year | 1984 | lld:pubmed |
| pubmed-article:6426460 | pubmed:articleTitle | Cross-linking in type IV collagen. | lld:pubmed |
| pubmed-article:6426460 | pubmed:publicationType | Journal Article | lld:pubmed |
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