Isomeric effects in collisionally-induced dissociation mass spectra of β-(1→6)-linked cyclic tetrasaccharides of the Glcp2GlcpN2 composition
T15N4
A.O. Chizhov , M.L. Gening, O.A. Pinsker, Yu.E. Tsvetkov, N.E. Nifantiev
Electrospray ionization high resolution mass spectra of positively charged ions (the first and the second order) of protonated molecules of isomeric β-(1→6)-linked cyclic tetrasaccharides of the Glcp2GlcpN2 composition were recorded and interpreted. It was shown that the second-order mass spectra of these compounds have some differences reflecting the mutual position of the glucopyranose and glucosamine residues. The most significant qualitative differences were observed for MS/MS spectra of doubly protonated, doubly charged molecules.
