Multiple Assemblies exist for SMTL entry 2ai2
Purine nucleoside phosphorylase from calf spleen; X-RAY DIFFRACTION 1.70 Å

	SMTL ID 2ai2.1 Ligands MAGNESIUM ION; ZINC ION; TRIS-HYDROXYMETHYL-METHYL-AMMONIUM; ((2S,3AS,4R,6S)-4-(HYDROXYMETHYL)-6-(4-OXO-4,5-DIHYDRO-3H-PYRROLO[3,2-D]PYRIMIDIN-7-YL)-TETRAHYDROFURO[3,4-D][1,3]DIOXO L-2-YL)METHYLPHOSPHONIC ACID Polypeptides Purine nucleoside phosphorylase Oligo-state homo-trimer
	SMTL ID 2ai2.2 Ligands MAGNESIUM ION; ZINC ION; TRIS-HYDROXYMETHYL-METHYL-AMMONIUM; ((2S,3AS,4R,6S)-4-(HYDROXYMETHYL)-6-(4-OXO-4,5-DIHYDRO-3H-PYRROLO[3,2-D]PYRIMIDIN-7-YL)-TETRAHYDROFURO[3,4-D][1,3]DIOXO L-2-YL)METHYLPHOSPHONIC ACID Polypeptides Purine nucleoside phosphorylase Oligo-state homo-trimer