1.3.1.28 ? x * 26000, deduced from nucleotide sequence 326414 1.3.1.28 additional information enzyme can form a specific complex with 2,3-dihydroxybenzoate-AMP ligase EntE. Cross-linked product with a molecular mass of more than 250 kDa, suggesting a complex stoichiometry of one EntA tetramer and four EntE monomers. Addition of a 4-fold excess of EntA to an EntE assay mixture results in a 6fold stimulation of EntE activity 721645 1.3.1.28 additional information enzyme undergoes concentration-dependent dimer-tetramer self-association with a KD value of 12.3 microM, analytical ultracentrifugation 721645 1.3.1.28 octamer 8 * 26249-26253, deduced from nucleotide sequence 390632, 390636 1.3.1.28 tetramer - -, 671073