2.6.1.77 DNA sequence determination and analysis 2.6.1.77 expression in Escherichia coli 2.6.1.77 gene cluster tauR-ald-tpa, genetic organization 2.6.1.77 gene cluster tauR-ald-tpa, genetic organization, DNA and amino acid sequence determination and analysis 2.6.1.77 orf459, essential for activity, no enzyme activity in deletion mutants