Supplemental Figure S5.

High-resolution views of immunofluorescence images scanned from normal tonsillar crypts (serial sections of similar regions for each panel), showing localization of monocytes and macrophages based on immune checkpoint receptors. Colocalization of CD14 (green) and CD68 (red) with poliovirus receptor (PVR; orange; A), V-domain Ig suppressor of T-cell activation (VISTA; orange; B), or carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1; orange; C). Scale bar = 20 μm (A–C).