Diapositive 1 - de l'Université libre de Bruxelles

Chapitre IVFigure 29: FTIR spectra of (A) standards: bovine serum albumine and chondroitin sulphate and (B) solubleand (C) insoluble organic matrices extracted from the calcitic skeleton of Asterias rubens.The XANES S-K edge spectrum of cystine, an aminoacid with a disulphide bond, showeda double peak at 2,473 keV (Figure 30A), whereas the sulphated sugar, chondroitinsulphate A, showed a main peak at 2.482 keV (Figure 30A). Sulphur aminoacids,methionine and cysteine, showed a main peak at 2.473 keV (Figure 30B). Similar doublepeak was also present in phenyl disulphides (data not shown).88