6TAA:
reference: Structure and molecular model refinement of Aspergillus oryzae (TAKA) alpha-amylase: an application of the simulated-annealing method., Swift HJ, Brady L, Derewenda ZS, Dodson EJ, Dodson GG, Turkenburg JP, Wilkinson AJ, Acta Crystallogr B 1991 Aug 1;47 ( Pt 4):535-44. PMID: 1930835

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