In further experiments, the respective band at 49 kDa from a Coomassie-stained SDS gel was hydrolysed tryptically, analysed via mass spectrometry and evaluated with Scaffold. The identified peptides showed a sequence coverage of 48% to the alkaline peptidase from P. fluorescens CY091. This alkaline peptidase, with a molecular mass of 49 kDa, determined by amino acid sequence, was previously described by Liao and McCallus (1998).