The invention pertains to chemoselective sensitivity booster for tagging a peptide, peptide conjugate, or similar reactive molecule for analysis of a peptide, protein, antibody, protein bioconjugate, antibody bioconjugate, and similar analytes. The sensitivity booster comprises of sp2 or sp3 nitrogen centers in combination with hydrophobic carbon chains linked with an electrophile or nucleophile for attachment with a peptide, peptide conjugate, or molecules with similar reactivity.

Systems and methods are disclosed for the treatment of cancer. Specifically, techniques are disclosed for treating cancer through the administration of genetically modified immune cells that overexpress fibroblast activation protein. In other embodiments, the techniques include the treatment of cancer through the administration of fibroblast activation protein inhibitors to the tumor site.