Calreticulin cell surface expression was determined by flow cytometry. Cells were stained first with a cell death detection antibody in the Zombie Green Fixable Viability Kit (423111, BioLegend) and then with a fluorophore-conjugated anti-calreticulin antibody (Abcam).
Fluorescence emission was analyzed using a FACSCanto II system with FACSDiva software (RRID:SCR_001456).
To identify immune cell populations, infiltrating immune cells were surface stained with the following antibody panel: anti–CD45-AF700 (BioLegend), anti–Ly6G-PerCP-Cy5.5 (BioLegend), anti–Ly6C-FITC(BioLegend), anti–F4/80-APC (BioLegend), anti–CD8-BV510 (BioLegend), anti–CD11b-BUV395 (BioLegend), and anti–CD4-BUV496 (BioLegend). PromoFLuor840 maleimide (PromoKine) was used as a viability marker. Samples were acquired with a CytoFlex flow cytometer (Beckman Coulter RRID:SCR_019627) and data analyses were performed using FlowJo v10 (RRID:SCR_008520).