~60 % of total enzyme sales
||Souza PM et al., Kinetic and thermodynamic studies of a novel acid protease from Aspergillus foetidus. Int J Biol Macromol. 2015 Nov81 :17-21. doi: 10.1016/j.ijbiomac.2015.07.043 p.17 left columnPubMed ID26210038
|| V. Zambare, S. Nilegaonkar, P. Kanekar A novel extracellular protease from Pseudomonas aeruginosa MCM B-327: enzyme production and its partial characterization N. Biotechnol., 28 (2011), pp. 173-181 DOI: 10.1016/j.nbt.2010.10.002PubMed ID20951241
||P.17 left column: "Microbial proteases (EC 3.4) are among the most important hydrolytic enzymes, representing one of the largest groups of industrial enzymes and accounting for approximately 60% of the total enzyme sales in the world [primary source]. The wide specificity of the hydrolytic action of proteases finds extensive applications in different industries such as the food, laundry detergent, leather, pharmaceutical and silk ones, for recovery of silver from exhausted X-ray films and for waste management, as well as in the structural elucidation of proteins, whereas their synthetic action is exploited in the synthesis of proteins [refs 2–5]." See Rao et al., 2009 link p.262 left column top paragraph: "Proteases constitute one of the most important groups of enzymes both industrially and academically. Their annual sales accounts 60% of the total world enzyme market and estimated to reach 220 billion US$ by the year 2009 [ref 1 therein]."