Multiple Assemblies exist for SMTL entry 1dr3
2.3 ANGSTROMS CRYSTAL STRUCTURE OF CHICKEN LIVER DIHYDROFOLATE REDUCTASE COMPLEXED WITH THIONADP+ AND BIOPTERIN; X-RAY DIFFRACTION 2.30 Å

	SMTL ID 1dr3.1 Ligands CALCIUM ION; 7-THIONICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE; 7,8-DIHYDROBIOPTERIN Polypeptides DIHYDROFOLATE REDUCTASE Oligo-state monomer
	SMTL ID 1dr3.2 Ligands CALCIUM ION; 7-THIONICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE; 7,8-DIHYDROBIOPTERIN Polypeptides DIHYDROFOLATE REDUCTASE Oligo-state homo-dimer