Heat Stability of Lipases of Selected Psychrophilic Bacteria in Milk and Purdue Swiss-Type Cheese

Abstract
Differences in heat stability of lipase produced by Pseudomonas fragi, P. muddolens and P. fluorescens were demonstrated. The enzyme produced by P. fluorescens was inactivated using the commercial heat treatment applied to milk, whereas the enzymes produced by P. fragi and P. mucidolens were more heat stable and caused off-flavor in Purdue Swiss-Type Cheese.