Multiple Assemblies exist for SMTL entry 1b18
PH AFFECTS GLU B13 SWITCHING AND SULFATE BINDING IN CUBIC INSULIN CRYSTALS (PH 5.53 COORDINATES); X-RAY DIFFRACTION 1.80 Å

	SMTL ID 1b18.1 Ligands SULFATE ION Polypeptides PROTEIN (INSULIN a chain); PROTEIN (INSULIN b chain) Oligo-state hetero-1-1-mer
	SMTL ID 1b18.2 Ligands SULFATE ION Polypeptides PROTEIN (INSULIN a chain); PROTEIN (INSULIN b chain) Oligo-state hetero-3-3-mer
	SMTL ID 1b18.3 Ligands SULFATE ION Polypeptides PROTEIN (INSULIN a chain); PROTEIN (INSULIN b chain) Oligo-state hetero-2-2-mer