人H-ras ELISA試劑盒
自備物品
1.酶標(biāo)儀(450nm)
2.高精度加樣器及槍頭:0.5-10uL、2-20uL、20-200uL、200-1000uL
3.37℃恒溫箱
人H-ras ELISA試劑盒
OPD氧化后的產(chǎn)物呈橙紅色,用酸終止酶反應(yīng)后,在492nm處有zui高吸收峰,靈敏度高,比色方便,是HRP結(jié)合物zui常用的底物。OPD本身難溶于水,OPD·2HCL為水溶性。曾有報道OPD有致異變性,操作時應(yīng)予注意。OPD見光易變質(zhì),與過氧化氫混合成底物應(yīng)用液后更不穩(wěn)定,須現(xiàn)配置現(xiàn)用。在試劑盒中,OPD和H2O2一般分成二組分,OPD可制成一定量的粉劑或片劑形式,片劑中含有發(fā)泡助溶劑,使用更為方便。過氧化氫則配入底物緩沖液中,有制成易保存的濃縮液,使用時用蒸餾水稀釋。*的ELISA試劑盒中則直接配成含保護(hù)劑的工作濃度為0.02% H2O2的應(yīng)用液,只需加入OPD后即可作為底物應(yīng)用液。
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