2IUM:
reference: Structure of the C-terminal head domain of the fowl adenovirus type 1 long fiber., Guardado-Calvo P, Llamas-Saiz AL, Fox GC, Langlois P, van Raaij MJ, J Gen Virol. 2007 Sep;88(Pt 9):2407-16. PMID: 17698649

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