Positive chemokine (C-C motif) receptor 2 (CCR2) expression in murine blood fibrocytes by confocal microscopy. Fibrocyte cultures were costained with CD45 and collagen I (A), CCR2 and CD45 (B), or CCR2 and collagen I (C). Fibrocytes were stained with isotype controls chicken IgY, rabbit IgG, and rat IgG2b(D). Nuclei were stained with 4',6-diamidino-2-phenylindole (DAPI; blue). Cells were examined at 40 × magnification. Representative images from blood pooled from n = 30 mice.