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Northern blot finding of RNA extracted from Naegleria fowleri trophozoites and/or CHO cells. The nfa1 mRNA was strongly transcribed 6 h after coculture. Lane 1, CHO cells only; lane 2, N. fowleri cocultured with CHO cells for 3 h; lane 3, N. fowleri cocultured with CHO cells for 6 h; lane 4, N. fowleri only.
