>2NSJ_1|Chain A|Phosphoribosylaminoimidazole carboxylase catalytic subunit|Escherichia coli (562) MSSRNNPARVAIVMGSKSDWATMQFAAEIFEILNVPHHVEVVSAQRTPDKLFSFAESAEENGYQVIIAGAGGAAHLPGMIAAKTLVPVLGVPVQSAALSGVDSLYSIVQMPRGIPVGTLAIGKAGAANAALLAAQILATHDKELHQRLNDWRKAQTDEVLENPDPRGAA