Figure 2: Representative diffraction patterns from (a) 5-HT2B, (b) AT1R, (c) SMO and (d) δ-OR.
From: Serial femtosecond crystallography datasets from G protein-coupled receptors

The solid grey areas are the regions outside the panels of the detector. The diffuse circle arises from the LCP matrix, and sharp spots from the crystals. Pattern (d) is shown with calculated reflection positions circled, but (a–c) are not.