Fig. 7
From: Purification and characterization of thermoactive serratiopeptidase from Serratia marcescens AD-W2
Cartoon view of the overall three-dimensional structure of Serratiopeptidase, a ribbon diagram showing the positions of the secondary structure elements was built using online SWISS-MODEL software (https://swissmodel.expasy.org/) and colored according to secondary-structure element. β-Strands are depicted as arrows, the zinc ion is shown by a grey ball, and calcium ions by black balls