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neurovas金蟲 (小有名氣)
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[求助]
求助帖,看看這段話什么意思? 已有1人參與
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Hemoglobin from bovine blood was obtained from Sigma. Methemoglobin was prepared by oxidation of Hb with a 2-fold excess of potassium ferricyanide and passage through a Sephadex G-25 column using 10 mM phosphate buffer (pH 7.0) as an eluent. Oxyhemoglobin was obtained by reduction of Hb with a 10-fold excess of sodium dithionite. The solution was then bubbled with O2 and purified on a Sephadex G-25 column. Concentrations of metHb and oxyHb were determined spectrophotometrically using ε405 = 1.79 × 105 M–1 cm–1 and ε500 = 1.00 × 104 M–1 cm–1 for metHb, ε415 = 1.25 × 105 M–1 cm–1 and ε577 = 1.38 × 104 M–1 cm–1 for oxyHb, b, expressed per heme (Antonini & Brunori, 1971). FerrylHb was prepared by incubation 1.5 × 10–5 M MetHb with an equimolar amount of H2O2 in relation to the heme group in 10 mM phosphate buffer at room temperature for 5 min (Sztiller et al., 2006). 重點是 ε415 = 1.25 × 105 M–1 cm–1 and ε577 = 1.38 × 104 M–1 cm–1 for oxyHb, 測完這兩個值之后,是相加得出oxyHb的濃度嗎?文章里面似乎并沒有講清楚。求助各位高手給解決一下! 下面附有全文!謝謝! |
金蟲 (小有名氣)
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有看過這篇paper么? http://www.sciencedirect.com/sci ... i/S0014579398813458 也提到類似的東西,或許可以給你一點提示…… |
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