摘要:
By using the chain to chain mode of cyclization the title glutathione analogue (gammaGlu-Cys-Asp-Cys) (4), containing the 11-membered disulfide ring (Cys-Asp-Cys) replacing the native -Cys-Gly fragment, has been synthesized and characterized together with its reduced dithiol form gamma-Glu-Cys-Asp-Cys (5). The activity of (4) with gamma-glutamyl-transferase and glutathione reductase has been evaluated and compared with those of the two conformationally restricted glutathione analogues (2) and (3) previously reported. (C) 2003 Elsevier Science (USA). All rights reserved.