Cell 153: 126-138 Somatic mutations of the immunoglobulin framework are generally required for broad and potent HIV-1 neutralization Florian Klein, Ron Diskin, Johannes F. Scheid, Christian Gaebler, Hugo Mouquet, Ivelin S. Georgiev, Marie Pancera, Tongqing Zhou, Reha-Baris Incesu, Brooks Zhongzh...