2.1.1.269 7 8 enzyme is more active in HEPES buffer than in MOPS or Tris-HCl buffer at the same pH 698600 2.1.1.269 7 8 enzyme is more active in HEPES than in MOPS buffer, but the activities in HEPES and Tris-HCl buffers are the same 698600 2.1.1.269 7 8 maximum activity is observed at pH 7.0 to 8.0 698600 2.1.1.269 7.2 - assay at 721447 2.1.1.269 7.5 - assay at 757585