| abstract |
The object of the present invention is to provide a technique for promoting membrane permeation of a drug, which is highly versatile and highly safe.The object can be solved by a polymer compound having a molecular weight of 1000 or more, wherein the polymer compound has, at an end of a side chain, one arginine or a basic peptide of chain length of 2 to 6 containing one or more arginine, and comprises a guanidino group of 0.5 to 20mmol/g, originating from arginine. |