Fig. 1From: Development of a human phage display-derived anti-PD-1 scFv antibody: an attractive tool for immune checkpoint therapya Polyclonal and b Monoclonal Phage ELISA of selected scFvs against PD-1protein. Data are shown as means [± SD] of OD values from triplicate experiments. An arbitrary cutoff three times greater than the negative control (BSA-coated wells) was considered positiveBack to article page