Enzymes are protein products which are most stable at their isoelectric point (zwitterion). At higher pH values enzymes ionize as weak acids and are precipitated by cationic inhibitors. At lower pH values they ionize as weak bases and are precipitated by anionic inhibitors. Enzymes have three dimensional shapes with the following configurations: alpha helix design, beta pleated sheets, and hairpin turns. They are used in food and beverage processing, medical and pharmaceutical applications, and in textile processing operations. The enzyme, amylase, that is specific for hydrolyzing starch, has been used for a very long time for desizing starch sized cotton warp yarns of woven fabrics. More recently enzymes have been investigated for replacement of harsher chemicals used in some textile operations, such as for bio-polishing and bio-stoning of fabrics in garment form. In the latter operation enzymes have replaced the pumice stones which were used to soften garments and to remove surface color for obtaining the washed-down appearance on garments.