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PDT conjugation strategies and targeting agents. (a) Direct conjugation of a PS to an EGFR-targeting agent. (b) Surface modification of a nanovector, incorporating a photosensitizer payload with EGFR-targeting agents. (c) Cellular localization of PSs after interaction between the targeting agent and EGFR receptor. (d) Different targeting agents used in EGFR-targeted PDT and their dimension in kDa. Created with BioRender.com.
