1887

Abstract

An oligosaccharide fraction containing the antigenic determinant of lipopolysaccharide antigen (TM antigen) from . recognized by a monoclonal antibody (CT3) which agglutinates serovars . was isolated by formic acid and successive sulphuric acid hydrolyses. Separation of the antigenic compounds was done by Bio-Gel P-2 and Sephadex G-25 gel filtration, and high-performance liquid chromatography with two different columns. The fraction finally obtained was a mixture of two oligosaccharides, both of which migrated as a single spot having a slightly higher mobility than an authentic tetrasaccharide (stachyose) on thin layer chromatography. The fraction contained rhamnose, arabinose and two major and two minor unknown sugars which were shown to be - or -acetylated and/or -methylated sugars by nuclear magnetic resonance. The fraction inhibited the binding of CT3 antibody with TM antigen in enzyme-linked immunosorbent assay and microscopic agglutination of serovar with the antibody. The inhibitory activity was destroyed by periodate oxidation or mild alkaline treatment, but was resistant to sodium borohydride reduction.

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/content/journal/micro/10.1099/00221287-130-6-1429
1984-06-01
2021-07-28
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