Updated project metadata. we wanted to see where and how the protein p37 interacts with its partner proteins p97, PPI,Sds22 and I3. To this end p37 derivatives with genetically encoded crosslinking amino acid (p-benzoyl-L-phenylalanine) were generated. After incubation with the partner proteins, photocross-linking and tryptic digest the resulting cross-linked peptides were analysed by mass spectrometry.