Transcription factors not shared between human and mouse monocyte subsets. Bar graph depicts results from microarray as relative fold change of transcriptional regulators in (A) human and (B) mouse monocyte subsets, where negative values are more highly expressed on the CD16⁻ human or Ly-6C⁺ mouse monocyte subset and positive values are more highly expressed on the CD16⁺ human or Ly-6C^lo mouse subset.