Furthermore, the highly potent near-infrared (NIR) imaging/photosensitizer IRDye700 (phototheranostics) agent was conjugated to several recombinant antibody fragments targeting different cancer cell-surface receptors using SNAP-tag technology to generate a panel of NIR photoimmunotheranostics (NIR-PIT) agents [47,81,84,85,86]. Here, CD177 is linked to cancer.