3ZHW:
reference: X-Ray crystallographic structural characteristics of Arabidopsis hemoglobin I and their functional implications., Mukhi N, Dhindwal S, Uppal S, Kumar P, Kaur J, Kundu S, Biochim Biophys Acta. 2013 Feb 26. pii: S1570-9639(13)00087-3. doi:, 10.1016/j.bbapap.2013.02.024. PMID: 23485912

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