2Y1V:
reference: The full-length Streptococcus pneumoniae major pilin RrgB crystallizes in a fiber-like structure, which presents the D1 isopeptide bond and provides details on the mechanism of pilus polymerization., El Mortaji L, Contreras-Martel C, Moschioni M, Ferlenghi I, Manzano C, Vernet T, Dessen A, DI Guilmi AM, Biochem J. 2011 Oct 21. PMID: 22013894

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