Complex sentence: For example, commonly-used laundry detergents may contain subtilisin where a methionine that may be oxidized by bleach and inactivating the protein in the process has been replaced by alanine, thereby making the protein active in the presence of bleach.
Split into simpler sentences: For example, commonly-used laundry detergents may contain subtilisin where a methionine that may be oxidized by bleach and inactivating the protein in the process. This methionine may be replaced by alanine, thereby making the protein active in the presence of bleach.