The baking quality of rye flour and the shelf life of rye bread can be improved by partial hydrolysis of the rye pentosans. Technical peptosanase preparations are mixtures of β-glycosidases (1,3-and 1,4-β-D-xylanases, etc.). Solubilization of plant constituents by soaking in an enzyme preparation (maceration) is a mild and sparing prosess. Such preparations usually contain exo- and endo-cellulases. α – and β-mannosidases and pectolytic enzymes (cf. 2.7.2.2.13). Examples of the utilization are: production of fruit and vegetable purees (mashed products), disintegration of tea leaves, or production of dehydrated mashed potatoes. Some of these enzymes are used to prevent mechanical damage to cell walls during mashing and thus, to prevent excessive leaching of gelatinized starch from the cells. Which would make the puree too sticky.
Glycosidases (cellulases and amylases from Aspergillus niger) in combination with proteinases are recommended for removal of shells from shrimp. The shells are loosened and then washed off in a stream of water.