Escherichia coli O123 O antigen genes and polysaccharide structure are conserved in some Salmonella enterica serogroups.

The serotyping of O and H antigens is an important first step in the characterization of Salmonella enterica. However, serotyping has become increasingly technically demanding and expensive to perform. We have therefore sequenced additional S.

Hydrolysis of Nothogenia erinacea xylan by xylanases from families 10 and 11.

The structures of several enzymatic hydrolysis products of Nothogenia erinacea seaweed xylan, a linear homopolymer with mixed beta-(1-->3)/beta-(1-->4) linkages, were analysed by physicochemical and biochemical techniques. With the glycoside hydrolase family 10 beta-(1-->4)-xylanase from Cryptococcus adeliae, hydrolysis proceeds to a final mixture of products containing a mixed linkage-type triose as a major compound, whereas with the family 11 xylanase from Thermomyces lanuginosus this is a mixed linkage tetraose. The Cryptococcus xylanase is shown to be capable of also catalysing the hydrolysis of beta-(1-->3) linkages, that is this of a mixed type tetraose intermediary formed, in accordance with the broader substrate specificity of family 10 enzymes.