Patent ID: 7838036

Claim:
A bead for isolating nucleic acid from cells, comprising a material represented by Formula 1 below bound to the surface of the bead: where Z 1 is a carboxyl group or an amino group; R 1 , R 2 , R 3 , R 5 , R 6 , R 7 , R 8 , R 9 and R 11 are each independently selected from the group consisting of a hydrogen atom, a halogen atom, a hydroxyl group, a substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C1-C20 alkoxy group, a substituted or unsubstituted C2-C20 alkenyl group, a substituted or unsubstituted C6-C30 aryl group, and a substituted or unsubstituted C6-C30 aryloxy group; R 4 is a substituted or unsubstituted C4-C20 alkyl group, a substituted or unsubstituted C4-C20 alkoxy group, a substituted or unsubstituted C4-C20 alkenyl group, a substituted or unsubstituted C6-C30 aryl group, or a substituted or unsubstituted C6-C30 aryloxy group; R 10 is a nitrogen-containing heteroaryl or heterocyclic group of 3-30 carbon atoms; j, k, l and m are each independently an integer in the range of 1-10; and n is an integer in the range of 1-30,000.