Multiple Assemblies exist for SMTL entry 2xb2
Crystal structure of the core Mago-Y14-eIF4AIII-Barentsz-UPF3b assembly shows how the EJC is bridged to the NMD machinery; X-RAY DIFFRACTION 3.40 Å

	SMTL ID 2xb2.1 Ligands MAGNESIUM ION; PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER Polypeptides PROTEIN CASC3; REGULATOR OF NONSENSE TRANSCRIPTS 3B; EUKARYOTIC INITIATION FACTOR 4A-III; PROTEIN MAGO NASHI HOMOLOG; RNA-BINDING PROTEIN 8A Oligo-state hetero-1-1-1-1-1-mer
	SMTL ID 2xb2.2 Ligands MAGNESIUM ION; PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER Polypeptides EUKARYOTIC INITIATION FACTOR 4A-III; PROTEIN MAGO NASHI HOMOLOG; RNA-BINDING PROTEIN 8A; REGULATOR OF NONSENSE TRANSCRIPTS 3B; PROTEIN CASC3 Oligo-state hetero-1-1-1-1-1-mer