4R27:
reference: Rational design of a beta-glycosidase with high regiospecificity for triterpenoid tailoring., Park SJ, Choi JM, Kyeong HH, Kim SG, Kim HS, Chembiochem. 2015 Mar 23;16(5):854-60. doi: 10.1002/cbic.201500004. Epub 2015 Feb, 20. PMID: 25703680

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