2.5.1.44 E237Q site-directed mutagenesis, altered active site structure and impaired subsrate binding compared to wild-type, overview 739672 2.5.1.44 H296S site-directed mutagenesis, altered active site structure and impaired subsrate binding compared to wild-type, overview 739672 2.5.1.44 additional information construction of a mutant strain Rt hss::omega,Spr of Rhizobium tropici strain Rt CIAT899 impaired in the synthesis of homospermidine, neither homospermidine nor 4-aminobutilcadaverine are detected in the free-living mutant bacteria and in nodules of plants inoculated with the mutant strain -, 739378