Deletion of the ZNF198 proline-rich region abolishes ZNF198–FGFR1 self-association.

4 and 10 zinc finger ZNF198–FGFR1 isoforms that were full-length (4ZF-MYC and 10ZF-MYC, respectively) or deleted for the ZNF198 proline-rich region (4ZFΔPR-HA and 10ZFΔPR-HA, respectively) were expressed individually (columns 1, 2, 4, and 5) or coexpressed (columns 3 and 6), and then analyzed directly (INP) or immunoprecipitated with anti-HA or anti-MYC.