1I2D:
reference: Crystal structure of ATP sulfurylase from Penicillium chrysogenum: insights into the allosteric regulation of sulfate assimilation., MacRae IJ, Segel IH, Fisher AJ, Biochemistry 2001 Jun 12;40(23):6795-804. PMID: 11389593

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