1.1.1.22 phosphoprotein possible role of Ugd phosphorylation in the production of a constitutively expressed capsular polysaccharide, no role for phosphorylation in modulating activity of Ugd. Escherichia coli might contain two bacterial tyrosine kinases, analysis of kinase deletion mutants of Escherichia coli strains, overview 740710 1.1.1.22 phosphoprotein tyrosine phosphorylation in the activation of Ugd of Escherichia coli K12. Possible role of Ugd phosphorylation in the production of a constitutively expressed capsular polysaccharide (CPS), no role for phosphorylation in modulating activity of Ugd. Escherichia coli might contain two bacterial tyrosine kinases, analysis of kinase deletion mutants of Escherichia coli strains, overview 740710