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(a) Fluorescein isothiocyanate (FITC)–anti-C3 labelling of rat conjunctival and subconjunctival tissues injected with 5I2 F(ab′)2 fragments. Label is seen in the epithelium (e) and in vessel walls (arrow). (b) FITC–anti-C3 labelling of rat conjunctival and subconjunctival tissues injected with control F(ab′)2. Neither the epithelium nor the vessels show label.
