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HNSCC cells that have high levels of ALDH expression also express CD44 at high levels. A. HN79 sorted for ALDH expression. P6 represents cells with high levels of ALDH expression (ALDHhigh). B. Only HN79 cells with elevated ALDH levels (P6) have been sorted for CD44 expression. The cells in P10 represent the population of cells with high ALDH expression that also express CD44. Approximately 70% of the ALDH high cells are also CD44+.
