Multiple Assemblies exist for SMTL entry 2ai1
Purine nucleoside phosphorylase from calf spleen; X-RAY DIFFRACTION 2.00 Å

	SMTL ID 2ai1.1 Ligands MAGNESIUM ION; ZINC ION; TRIS-HYDROXYMETHYL-METHYL-AMMONIUM; ((2R,4R,6R,6AS)-4-(2-AMINO-6-OXO-1,6-DIHYDROPURIN-9-YL)-6-(HYDROXYMETHYL)-TETRAHYDROFURO[3,4-D][1,3]DIOXOL-2-YL)METHYLPHOSPHONIC ACID Polypeptides Purine nucleoside phosphorylase Oligo-state homo-trimer
	SMTL ID 2ai1.2 Ligands MAGNESIUM ION; ZINC ION; TRIS-HYDROXYMETHYL-METHYL-AMMONIUM; ((2R,4R,6R,6AS)-4-(2-AMINO-6-OXO-1,6-DIHYDROPURIN-9-YL)-6-(HYDROXYMETHYL)-TETRAHYDROFURO[3,4-D][1,3]DIOXOL-2-YL)METHYLPHOSPHONIC ACID Polypeptides Purine nucleoside phosphorylase Oligo-state homo-trimer