Properties of thyroglobulin. XII. Comparison of the configurational states of reduced and unreduced thyroglobulin

✍ Scribed by H. Edelhoch; R. F. Steiner

• Book ID: 102760195
• Publisher: Wiley (John Wiley & Sons)
• Year: 1966
• Tongue: English
• Weight: 765 KB
• Volume: 4
• Category: Article
• ISSN: 0006-3525
• DOI: 10.1002/bip.1966.360040905

✦ Synopsis

Synopsis

The relaxation time of thyroglobulin has been determined in water at neutral pH, in concentrated urea and guanidine solutions, at alkaline pH, both before and after reduction with p-mercaptoethanol. The structure of thyroglobulin in concentrated urea solutions is markedly affected by the pH. Time-dependent changes occur in thyroglobulin in concentrated urea or guanidine solutions which are observable by polarization of fluorescence but not by optical rotation or viscosity. The reduction of the disulfide crosslinks of thyroglobulin in urea at high pH or in guanidine produces linear polypep t,ide chains with few if any permanent contacts between segments.