1KU4:
reference: Antibody evolution from the centre to the periphery: applied to a human antibody fragment recognising the tumour-associated antigen mucin-1., Jirholt P, Borrebaeck CA, Ohlin M, J Mol Biol 2002 Apr 26;318(2):407-16. PMID: 12051847

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