TABLE 1.

Structures of large ribosomal subunit with low-molecular-weight substrates and transition-state analogs bound

Structure	PDB file #	Reference
Large subunit with no ligands bound	1JJ2	Klein et al. 2001
Large subunit with a transition-state analog (CCdA-p–puro) bound	1FFZ	Nissen et al. 2000
Large subunit with an acceptor stem in the A site	1FGO	Nissen et al. 2000
Large subunit with CCA in the P site and CC-puromycin–phe-caproic acid–biotin in the A site	1KQS	Schmeing et al. 2002
Large subunit with CC-puromycin–phe-caproic acid–biotin stabilized in the P site by sparsomycin	1M90	Hansen et al. 2002