3P0I:
reference: The Double-Length Tyrosyl tRNA Synthetase from the Eukaryote Leishmania major Forms an Intrinsically Asymmetric Pseudo-Dimer., Larson ET, Kim JE, Castaneda LJ, Napuli AJ, Zhang Z, Fan E, Zucker FH, Verlinde CL, Buckner FS, Van Voorhis WC, Hol WG, Merritt EA, J Mol Biol. 2011 Mar 21. PMID: 21420975

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