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(A) Phage selection scheme. Dual functional cloning consists of phagocytosis-based functional selection with D407 RPE cells and receptor-based affinity selection with immobilized Mer-Fc. Four rounds of combined selections were performed. (B) Total phages phagocytosed by D407 at each round were quantified by plaque assay. (C) Total phages bound to Mer-Fc at each round were quantified. The control phage was included as a negative control
