Nanoscale liquid chromatography system coupled with a middle or high-end mass spectrometer (MS) is recommended for the analysis of Microscoop™ photolabeled samples. If the targeted structure is greater than 3 μm in both length and width, and at least one such structure is present in a cell, the samples can be analyzed using a MS with ~10 Hz of MS/MS acquisition rate, such as Q-exactive™ Plus (Thermo Fisher Scientific). When the targeted structure is tiny or sparse, we recommend analyzing the sample with a MS which features >20 Hz of MS/MS acquisition rate, such as Orbitrap Fusion™ Lumos™ (Thermo Fisher Scientific), Orbitrap Eclipse™ (Thermo Fisher Scientific), timsTOF (Bruker), TripleTOF® (SCIEX), ZenTOF (SCIEX).