Sepharose-linked concanavalin A in the purification and characterization of glycoprotein hormones of the bovine pituitary
BBA - Protein Structure, ISSN: 0005-2795, Vol: 533, Issue: 2, Page: 371-382
1978
- 33Citations
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Metrics Details
- Citations33
- Citation Indexes33
- 33
- CrossRef24
Article Description
Affinity chromatography on concanavalin A-Sepharose is a time saving step in both large and small scale isolations of the bovine pituitary glycoprotein hormones. After ion-exchange chromatography, the final yield of purified lutropin is 40-50% of material in starting concentrates and of purified thyrotropin is approximately 20%. The final products have the same electrophoretic and immunological properties and amino acid compositions as previous preparations. Less than 3% of the immunoreactive lutropin, follitropin and thyrotropin are present as non-glycosylated forms in either crude pituitary extracts or concentrates. Thyrotropin and follitropin elute from the immobilized lectin as a single fraction, whereas lutropin separates into two glycosylated fractions. Gel filtration of both crude extracts and the glycoprotein fractions shows that less than 5% of the immunoreactivity of the hormones is present as material of apparently high molecular weight. Substantial α subunit immunoreactivity, however, is in three fractions (as found by others in human pituitary extracts) corresponding to "high molecular weight material" (7%), intact hormones (46%) and free subunit (47%). © 1978.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0018191287&origin=inward; http://dx.doi.org/10.1016/0005-2795(78)90383-5; http://www.ncbi.nlm.nih.gov/pubmed/647015; https://linkinghub.elsevier.com/retrieve/pii/0005279578903835; http://dx.doi.org/10.1016/0005-2795%2878%2990383-5; https://dx.doi.org/10.1016/0005-2795%2878%2990383-5
Elsevier BV
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