3FET:
reference: The catalytic domain of the germination-specific lytic transglycosylasesleb from bacillus anthracisdisplays a unique active site topology., Jing X, Robinson HR, Heffron J, Popham DL, Schubot FD, Proteins. 2012 Jul 7. doi: 10.1002/prot.24140. PMID: 22777830

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