5MMU:
reference: Structure of the Major Apple Allergen Mal d 1., Ahammer L, Grutsch S, Kamenik AS, Liedl KR, Tollinger M, J Agric Food Chem. 2017 Mar 1;65(8):1606-1612. doi: 10.1021/acs.jafc.6b05752., Epub 2017 Feb 15. PMID: 28161953

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