>1QP4_1|Chain A[auth M]|DNA (5'-D(*TP*AP*CP*GP*CP*AP*AP*TP*CP*GP*AP*TP*TP*GP*CP*GP*T)-3')|
TACGCAATCGATTGCGT
>1QP4_2|Chain B[auth A]|PROTEIN (PURINE NUCLEOTIDE SYNTHESIS REPRESSOR)|Escherichia coli (562)
ATIKDVAKRANVSTTTVSHVINKTRFVAEETRNAVWAAIKELHYSPSAVARSLKVNHTKSIGLLATSSEAAYFAEIIEAVEKNCFQKGYTLILGNAWNNLEKQRAYLSMMAQKRVDGLLVMCSEYPEPLLAMLEEYRHIPMVVMDWGEAKADFTDAVIDNAFEGGYMAGRYLIERGHREIGVIPGPLERNTGAGRLAGFMKAMEEAMIKVPESWIVQGDFEPESGYRAMQQILSQPHRPTAVFCGGDIMAMGALCAADEMGLRVPQDVSLIGYDNVRNARYFTPALTTIHQPKDSLGETAFNMLLDRIVNKREEPQSIEVHPRLIERRSVADGPFRDYRR