PROLINE-SPECIFIC PEPTIDASES OF STREPTOCOCCUS-CREMORIS AM2

The present study identifies proline-specific peptidases found in Streptococcus cremoris AM2. These activities were present predominantly in the cytoplasmic fraction of the cells with minor amounts in cell membrane fraction. No evidence was found for such activities in either the extracellular fluid used to grow the cells, in the wash fraction or in the cell wall fraction. The involvement of these enzymes in release of free proline from proline-containing peptides is considered. © 1990, Proprietors of Journal of Dairy Research. All rights reserved.