1BKA:
reference: Anion binding by transferrins: importance of second-shell effects revealed by the crystal structure of oxalate-substituted diferric lactoferrin., Baker HM, Anderson BF, Brodie AM, Shongwe MS, Smith CA, Baker EN, Biochemistry 1996 Jul 16;35(28):9007-13. PMID: 8703903

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