... bridging protein consisting of the immunoglobulin G (IgG)-binding β2 domain of streptococcal protein G modified by genetic fusion with the positively charged leucine zipper interaction domain (PG-zb), ... III Series: Methods in molecular biology (Clifton, N.J.) ; 303 TP248.25.N35N35 2005 660.6 dc22 2005000473 Preface Increasingly, researchers find themselves involved in discipline-spanning science ... protein avidin A genetically engineered maltose-binding protein appended with the charged leucine zipper (MBP-zb) was used as a purification tool in conjunction with both types of bridging proteins...