cellulolyticus and a method of producing it are disclosed the enzyme is water soluble possesses both c 1 and c x types of enzymatic activity has a high degree of stability toward heat and exhibits both a high optimum temperature activity and high inactivation characteristics application_number US 41243489 A description acidothermus cellulolyticus has been studied in detail taxonomically resulting in both a new genus and species name to support the criteria for novelty of the organism and the cellulase secreted by this organism into the medium in which it has been grown the detailed characteristics of the organism is published in the international journal of systematic bacterioloy 36 1986 pp 435 443 the microorganism utilizes a wide variety of simple sugars as well as a variety of cellulosic materials such as cellulose powder as the sole carbon source a minimal mineral media containing inexpensive and readily obtainable salts and a nitrogen source inorganic ammonium salts or organic nitrogenous materials such as amino acids is used yeast extract may be used by supplementation into the minimal mineral media to serve as a source of various growth factors this bacterium grows within a ph range of 3 to 7 and a temperature range of 40 u00b0 to 70 u00b0.