| http://www.w3.org/ns/prov#value | - water or in buffer (e.g., phosphate, HEPES, citrate, Tris-HCl, Tris-glycine, malate, etc. at pH values that range from 4.0 to 8.5), may contain salt (e.g., 1-250 mM), and may contain glycerol, sucrose, trehalose, xylose, or other sugars (e.g., mono-, di-, or polysaccharide).
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