PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 11980482-2 2002 We show here that Fis subunits rapidly exchange between dimers in solution by disulfide cross-linking mixtures of Fis mutants with different electrophoretic mobilities and by monitoring energy transfer between fluorescently labeled Fis subunits upon heterodimer formation. Disulfides 78-87 long intergenic non-protein coding RNA 1554 Homo sapiens 18-21