The streptavidin-DNA conjugate was then
stored in aliquots at −80 °C with 0.1% bovine serum albumin (BSA),
5 mM EDTA, and 0.02% sodium azide, without further purification.
这种保存液0.1% bovine serum albumin (BSA),
5 mM EDTA, and 0.02% sodium azide能不能直接买到（叠氮化钠不好买，自己配的也不放心）
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