During DNA replication, mutations occur when an incorrect dNTP is incorporated opposite a carcinogen-modified nucleotide. We have probed the structures of the interaction between O 6-methylguanine ( O
Among the Escherichia coli operons repressed from multiple sites on DNA, the galactose operon is unique: its repression requires an auxiliary protein, HU, to assist cooperative repressor binding to tw
OBJECTIVE: Development of methods for building concept models to support structured data entry and image retrieval in chest radiography. DESIGN: An organizing model for chest-radiographic reporting wa
