Patent ID: 7473733

Claim:
A complex between a cationic graft-copolymer of a water-soluble linear backbone polymer having hydroxyl groups and DNA, comprising a unit derived from a cationic water-soluble linear polysaccharide of the following formula (1) [C 6 H 7 O 2 (OH) 3−a (OX) a ] x H 2 O (1) or a unit derived from a water-soluble linear polyvinylalcohol of the following formula (2) or a partial hydrolyzed alcohol of the following formula (3) —[CH 2 CH(OH) 1−b (OX) b ] n — (2) —[CH 2 CH(OH) 1−b−c (OX) b (OAc) c ] n — (3) wherein X is a —(CH 2 ) m R 1 organic radical where R 1 is a member of the class consisting of: —NH 3 + radical, —NH + (CH 3 ) 2 radical, —NH + (C 2 H 5 ) 2 radical, —N + (C 2 H 5 ) 3 radical, —N + (CH 2 ) 2 CH 2 CH(OH)CH 3 radical, —N + (C 2 H 5 ) 2 CH 2 CH(OH)CH 3 radical, —N + (C 2 H 5 ) 2 (C 2 H 5 )N(C 2 H 5 ) 2 radical, —C 6 H 4 NH 3 + radical, —COC 6 H 4 NH 3 + radical, —COR 2 radical where R 2 is —CH 2 NH 3 + or —C 6 H 4 NH 3 + , and —CH 2 CH(OH)CH 2 R 3 radical where R 3 is —NH 3 + , —NH + (CH 3 ) 2 , —NH + (C 2 H 5 ) 2 , or —N + (C 2 H 5 ) 3 radical, where m is a natural number of 1 to 3, a is a positive number having a value of 0<a<3, b is a positive number having a value of 0<b<1, x and n are natural numbers having a value of 5 or more, 1>b+c, and Ac is acetyl radical; a unit derived from a polymerize-able olefin compound of the following formula (4) wherein R 4 , R 5 and R 6 are each selected from the group consisting of hydrogen and CH 3 and R 7 is a member of the group consisting of: where R 8 is a member of the class consisting of hydrogen, C 1 -C 12 alkyl radicals, cyclohexyl radical, C 1 -C 4 hydroxyalkyl radicals, C 1 -C 8 aminoalkyl radicals, C 1 -C 8 dialkylaminoalkyl radicals, glycidyl radical, tetrahydrofuran radical, C 1 -C 4 lower alkyl -substituted tetrahydrofuran radical, benzyl radical, a (CH 2 CH 2 O) y CH 2 CH 2 OH radical where y is a positive integer from 1 to 10, and —N(R 9 ) 2 where the two R 9 's which may be the same or different, are either hydrogen or a C 1 -C 4 alkyl radical; where R 10 is a C 1 -C 8 alkyl radical, phenyl radical, tolyl radical, pyridine radical, pyrrolidone radical; and where R 11 is NH 2 , NHCH 3 , N,N-dimethylamino radical, N,N-dimethylaminopropylamino radical, and morpholine radical; and a unit derived from a poly(deoxyribonucleotide) of the following formula (5) as a recurring unit: where B 1 is a base selected from the group of adenine, thymine, guanine, and cytosine.