| http://www.w3.org/ns/prov#value | - This pH dependent attachment effect specific for the ends, is an improvement compared with the other surfaces which require functionalization of the DNA (biotin, DIG, NHS, and the like) or specific reagents (carbodiimide, dimethyl pimelidate) which forma peptide or phosphorimide linkage between --NH.sub.2 and --COOH or --POOH.It is also possible to carry out the anchoring of DNA by adsorption of i
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