| http://www.w3.org/ns/prov#value | - Alternatively a solution gradient can be flowed through the cell, for example a solution or solutions containing increasing concentrations of a denaturants such as formamide or urea, or decreasing concentrations of salts such as guanidine thiocyanate or sodium trifluoroacetate, which will cause shorter stem hybrids to open first and the longest, or more accurately strongest, stem hybrids to open l
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