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. 2021 Apr 9;11:53. doi: 10.1186/s13568-021-01215-7

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© The Author(s) 2021, corrected publication 2021

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Fig. 9 — Stereoview of the zinc-binding site in the Serratiopeptidase. The zinc ion is shown as a purple ball. The active site of serratiopeptidase from S. marcescens AD-W2 shows the zinc ion coordinated as Zn.1, His.192, His.196, His.202, Glu.193, and Tyr.232 is forming a distorted trigonal bipyramidal catalytic active center