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Li, Z., Zhang, J., Wang, M., Gu, Z., Du, G., Li, J., … Chen, J. (2009). Mutations at subsite ?3 in cyclodextrin glycosyltransferase from Paenibacillus macerans enhancing α-cyclodextrin specificity. Applied Microbiology and Biotechnology, 83(3), 483–490. doi:10.1007/s00253-009-1865-3 
10.1007/s00253-009-1865-3