Molecular weight and amino acid composition of a thermostable lytic endopeptidase

A thermostable lytic endopeptidase from Bacillus stearothermophilus 1503-4R was purified 14,500-fold, with a 34% recovery of lytic activity. The enzyme is a basic protein (pI, 9.7) with a molecular weight of 15,100 and is composed of approximately 129 amino acid residues.