Patent ID: 7446099

Claim:
A complex for delivering an isolated DNA to a cell, comprising: (a) the isolated DNA, and (b) a biodegradable polyacetal-peptide, wherein the biodegradable polyacetal-peptide comprises at least one recurring unit represented by a formula selected from the group consisting of (I) and (II): wherein the peptide is selected from SEQ ID NOS: 5, 6 and 8; wherein X is selected from the group consisting of CH 2 CH 2 , CH 2 CH 2 CH 2 CH 2 , CH 2 CH 2 OCH 2 CH 2 , and CH 2 CH 2 OCH 2 CH 2 OCH 2 CH 2 ; and wherein Y is selected from the group consisting of linear or branched C 4 H 8 , C 5 H 10 , C 6 H 12 , C 7 H 14 , C 8 H 16 , C 10 H 20 , and C 12 H 24 .