A spectrophotometric method for measuring hemoglobin in erythroleukemic cells (K562).

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Abstract
The benzidine reaction was used to measure Hb in human erythroleukemic (K562) cells stimulated to synthesize Hb. Increments in Hb concentration paralleled the increase in numbers of benzidine-positive cells that occurred in response to the presence of bovine hemin in the medium.