| 摘要 |
Many metal collators have polar or charged functional groups, which render them difficult to transport across a cell membrane. Polyimide-metal collator conjugates of the invention are compounds comprising a first moiety which is a metal collator and a second moiety which is a polyimide, where the polyimide moiety includes three or more nitrogen atoms which are capable of being positively charged at physiological pH. A sperms-L1 conjugate has been shown to accumulate in L1210 cells several hundred fold more than the unconjugated L1 chelator.
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