Steve D Billings

  • Citations Per Year
Learn More
Haemophilus ducreyi contains 3 TonB-dependent receptors: the hemoglobin receptor HgbA, which is required for virulence in humans; the heme receptor TdhA; and an uncharacterized conserved hypothetical protein TdX (HD0646). A double tdX/tdhA mutant (FX527) was constructed on the background of a human-passaged variant of strain 35000 (35000HP). Six volunteers(More)
We have previously demonstrated that the EP1 subtype of PGE2 receptor is expressed in the differentiated compartment of normal human epidermis and is coupled to intracellular calcium mobilization. We therefore hypothesized that the EP1 receptor is coupled to keratinocyte differentiation. In in vitro studies, radioligand binding, RT-PCR, immunoblot and(More)
Eight Neisseria gonorrhoeae isolates, negative by direct fluorescent antibody (DFA) but positive by a DNA probe, were characterized by pulsed field gel electrophoresis and compared to eight DFA-positive, probe-positive isolates. Results indicate that DFA-negative, probe-positive Neisseria gonorrhoeae isolates may be clonal.
  • 1