Patent ID: 7060776

Claim:
A cross-linked aqueous matrix comprising a water-insoluble copolymer comprising repeating units of an acrylic monomer suitable for use in electrophoresis, comprising the general formula wherein R 1 , R 2 and R 3 are each H or CH 3 , respectively; R 4 and R 5 are each H or OH, respectively; R 6 and R 7 , if present, are each H or OH, respectively, with the proviso that at least two of R 4 , R 5 , R 6 and R 7 are OH; R 8 is H or CH 3 , respectively; m is an integer of 2–4; and n and p are each integers of 0 or 1 with the proviso that if n is 0, then R 6 is not present, and if p is 0, the R 7 is not present; said matrix further comprising a mixture of the monomer defined by the general formula (II) —(NH) t C(═NH)(NH 2 ) (II) wherein t is an integer of 0 or 1, together with other monomers containing acidic and basic groups to determine the pH resulting within the matrix.