title: 252Cf plasma desorption mass spectrometric study of interactions of steroid glycosides with amino acids
abstract: 252Cf Plasma desorption with time-of-flight mass spectrometry (TOF-PDMS) has been applied to comparative studies of the interactions of steroid glycosides (SGs) of the spirostan series with amino acids. SGs can interact with amino acids to form heteroclusters of the type [SG + aminoacid + H](+) and [SG + aminoacid + K](+). It is shown how the affinity of SGs for amino acids depends on the structures of both the SG carbohydrate chain and the SG aglycone, and on the nature of the amino acid side chain. Copyright 2000 John Wiley & Sons, Ltd.
authors.affiliation: Institute of Applied Physics, National Academy of Sciences of Ukraine, 244030 Sumy, Petropavlovskaya St. 58, Ukraine.
authors.initials: VV
authors.lastname: Pilipenko
authors.initials: LF
authors.lastname: Sukhodub
authors.initials: SA
authors.lastname: Aksyonov
authors.initials: AN
authors.lastname: Kalinkevich
authors.initials: PK
authors.lastname: Kintia