xgx_theme_set()

conc <- 10^(seq(-3, 3, by = 0.1))
ec50 <- 1
data <- data.frame(concentration = conc, 
                   bound_receptor = 1 * conc / (conc + ec50))
xgx_theme_set()
ggplot2::ggplot(data, ggplot2::aes(y = concentration, x = bound_receptor)) +
  ggplot2::geom_point() +
  ggplot2::geom_line() +
  xgx_scale_y_log10() +
  xgx_scale_x_reverselog10()