Surface-stained mouse splenocytes (1 x 106) were fixed in 4% paraformaldehyde. An Amnis ImageStream Mark II (EMD Millipore, ON, Canada) was used to collect at least 10,000 images for each sample as we have previously described (31 (link)). Data were analyzed using the IDEAS analysis software package to select single-cell images that were in focus. Next, we performed gating for NK cells (CD49b+) followed by gating for cells that co-express Gal-9 and CD44. Colocalization of Gal-9 and CD44 was determined using the IDEAS colocalization wizard.
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