Purified, recombinant, humanized anti-PD-L1 (IgG1) antibody with C-terminal Avi-tag, expressed in HEK293 cells. Purified antibody was enzymatically biotinylated using AvitagTM technology. This antibody reacts with human PD-L1 and cross-reacts with mouse PD-L1. It has not been tested for cross-reactivity with other species.