. "Beginner Puzzle E.coli Lrp Protein 2GQQ Structure of the Escherichia coli leucine-responsive regulatory protein Lrp reveals a novel octameric assembly. de Los Rios, S., Perona, J.J. (2007) J.Mol.Biol. 366: 1589-1602"@en . . "Beginner Puzzle E.coli Lrp Protein 2GQQ Structure of the Escherichia coli leucine-responsive regulatory protein Lrp reveals a novel octameric assembly. de Los Rios, S., Perona, J.J. (2007) J.Mol.Biol. 366: 1589-1602"@en . "E.coli Lrp"@en .