The ubiquitously expressed DNA-binding protein late SV40 factor binds Ig switch regions and represses class switching to IgA.
Drouin EE, Schrader CE, Stavnezer J, Hansen U. The ubiquitously expressed DNA-binding protein late SV40 factor binds Ig switch regions and represses class switching to IgA. J Immunol. 2002 Mar 15; 168(6):2847-56.