4S3R:
reference: Structural basis for the interconversion of maltodextrins by MalQ, the amylomaltase of Escherichia coli., Weiss SC, Skerra A, Schiefner A, J Biol Chem. 2015 Jul 2. pii: jbc.M115.667337. PMID: 26139606

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).