Patent ID: 8653238

Claim:
A composition for transporting a cargo molecule across a biological barrier comprising: a cargo molecule, wherein the cargo molecule is taxol; a transporter molecule; and a releasable linker of the form which covalently links the cargo molecule and the transporter molecule; where R 1 is an optionally substituted C 1 -C 8 hydrocarbon group, an optionally substituted group of the form —CH 2 —O—(C═O)—C 1 -C 8 hydrocarbyl, or an optionally substituted C 1 -C 8 hetero chain group; V is O; and the composition having the formula (I): wherein Carg-Nu represents the residue of the cargo molecule “Carg-NuH”, wherein Nu is O; and Transp-S represents the residue of a transporter molecule “Transp-SH; and wherein the transporter molecule is a transport polymer comprising from 6 to 25 adjacent arginines.