Definition: a test to detect deficienty of glucose 6-phosphate in red blood cells; blood is incubated with sodium cyanide and ascorbate; the hydrogen peroxide that is generated is free to oxidize hemoglobin to methemoglobin, since cyanide inhibits catalase; a brown color is produced more rapidly in glucose 6-phosphate-deficient cells.
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Examples: glitazone, GI cocktail, etc.