... Nakano, Y. , Yoshida, Y. , Nakao, H., Yamashita, Y & Koga, T (2000) Genetic analysis of the gene cluster for the synthesis of serotype a-specific polysaccharide antigen in Actinobacillus actinomycetemcomitans ... encoding the biosynthesis of GDP-6-deoxy-D-talose nor its corresponding protein has been found Recently, we cloned and characterized a gene cluster involved in the biosynthesis of SPA from A actinomycetemcomitans ... for synthesizing the SPAs in other serotypes of A actinomycetemcomitans The biosynthetic pathway for GDP-6-deoxy-D-talose, Ó FEBS 2002 GDP-6-deoxy-D-talose synthetic enzyme (Eur J Biochem 269)...