Sample Origin

SAMPLE PREP./SIZE PYROL. CONDITIONS TOTAL ION COUNTS

: TEICHURONIC ACID (from Baoillue aubtilis)

■ poly[(l-»-4)£>GlcAa,e(l+3)/JGalNacct,e]; see insert in Spectrum A. 19a

: gift from Dr. J.T.M. Wouters, Lab. of Microbiology, Univ. of Amsterdam, The Netherlands suspension in methanol; 10 yg standard

3 X 105

REMARKS - Sample prepared following ref. 172. Abundant fragment ions at m/z 59, 73, 83, 109, 125, 139 and 151 indicate the GalNAc moieties and the peaks at m/z 96, 102, 112, 114 and 126 the GlcA moieties. Note the large difference between this fragment pattern and that obtained for the neutral PBS solution (Spectrum A.19a).

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