| abstract |
This lysine oligomer derivative is made by linking the ε-amino group and the carboxyl group of lysine by peptide linkage, and is characterized in that a group capable of generating or absorbing an electromagnetic wave is bonded to the C-terminal carboxyl group, the N-terminal amino group, and/or the α-amino group. This lysine oligomer derivative has the characteristic of specifically accumulating in the cartilage matrix and can generate or absorb an electromagnetic wave, and is thus useful as a cartilage tissue marker. |