William K. Merkel

Characterization and sequence of Escherichia coli pabC, the gene encoding aminodeoxychorismate lyase, a pyridoxal phosphate-containing enzyme

B. Nichols, W. Merkel, J. Green, 1992, Journal of bacteriology.

Evolution of glutamine amidotransferase genes. Nucleotide sequences of the pabA genes from Salmonella typhimurium, Klebsiella aerogenes and Serratia marcescens.

J. Kaplan, B. Nichols, W. Merkel, 1985, Journal of molecular biology.