Robert A. Nicholas

High-Level Cefixime- and Ceftriaxone-Resistant Neisseria gonorrhoeae in France: Novel<i>penA</i>Mosaic Allele in a Successful International Clone Causes Treatment Failure

Magnus Unemo, Daniel Golparian, Robert A. Nicholas et al. · Antimicrobial Agents and Chemotherapy · 2011 · 631 citations

Uridine nucleotide selectivity of three phospholipase C-activating P2 receptors: identification of a UDP-selective, a UTP-selective, and an ATP- and UTP-specific receptor.

Robert A. Nicholas, W. C. Watt, Eduardo R. Lazarowski et al. · Molecular Pharmacology · 1996 · 351 citations

Second messenger cascade specificity and pharmacological selectivity of the human P_2Y1‐purinoceptor

Joel B. Schachter, Qing Li, José L. Boyer et al. · British Journal of Pharmacology · 1996 · 251 citations · Full text

Amino Acids, Cellular Physiology, Molecular Pharmacology +16

<i>Neisseria gonorrhoeae</i> Isolates with Reduced Susceptibility to Cefixime and Ceftriaxone: Association with Genetic Polymorphisms in <i>penA</i> , <i>mtrR</i> , <i>porB1b</i> , and <i>ponA</i>

R. B. Lindberg, Hans Fredlund, Robert A. Nicholas et al. · Antimicrobial Agents and Chemotherapy · 2007 · 201 citations · Full text

Mutations in <i>ponA</i> , the Gene Encoding Penicillin-Binding Protein 1, and a Novel Locus, <i>penC</i> , Are Required for High-Level Chromosomally Mediated Penicillin Resistance in <i>Neisseria gonorrhoeae</i>

Patricia A. Ropp, Mei Hu, Melanie Olesky et al. · Antimicrobial Agents and Chemotherapy · 2002 · 186 citations · Full text