03
Feb
== The inclusion of a C6aliphatic linker group in sardbm aided reverse-phase HPLC purification and isolation of sardbm: the sar chelator motif is very hydrophilic and is poorly retained on reverse-phase columns in the absence of hydrophobic appendages. In contrast, the dfo chelator had sufficient adsorption on reverse-phase stationary phases, and so a C2linker group, which has demonstrated improved conjugation properties relative to a C6linker (vide infra),34was utilized. The yield of sardbm (8%) was significantly lower than the yield of dfodbm (22%). (dtm) conjugates, sardtmtrastuzumab and dfodtmtrastuzumab, in which interstrand disulfides are rebridged covalently with a small molecule linker. Both…