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Characterization of particle 7. (a) UV-vis absorbance spectra for 7 (solid line) and 1 (dashed line) in buffer, pH 7.4. (b) Size-exclusion FPLC showing co-elution of porphyrin with particle, verifying their covalent linkage. (c) Negative-stain transmission electron microscopy. (d) Dynamic light scattering determination of hydrodynamic radius. The corresponding data for 8 and 9 are very similar.
