6JQB:
reference: Structure of maltotetraose-forming amylase from Pseudomonas saccharophila STB07 provides insights into its product specificity., Zhang Z, Jin T, Xie X, Ban X, Li C, Hong Y, Cheng L, Gu Z, Li Z, Int J Biol Macromol. 2019 Nov 18. pii: S0141-8130(19)37071-0. doi:, 10.1016/j.ijbiomac.2019.11.006. PMID: 31751711

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