Stimuli that enhance IgA class switching increase histone 3 acetylation at S alpha, but poorly stimulate sequential switching from IgG2b.
Kaminski DA, Stavnezer J. Stimuli that enhance IgA class switching increase histone 3 acetylation at S alpha, but poorly stimulate sequential switching from IgG2b. Eur J Immunol. 2007 Jan; 37(1):240-51.