Candida albicans cells were heat killed, digested with an endo-β-1,6-glucanase, and opsonized. (A) β-1,6-glucan is required for efficient phagocytosis. Phagocytosis was assessed by Fluorescence Activated Cell Sorting (FACS) by the change in side scatter. (B) β-1,6-glucan is required for efficient ROS production. ROS production was assayed by FACS using DHR123. (C) β-1,6-glucan is required for induction of HSPs. HSPs induction was determined by quantitative real-time PCR. Results for β-1,6-glucanase digested Candida were normalized to undigested Candida. The data represent the average of two experiments with standard deviation.