Nature Immunology online: January 20, 2013 Transcriptional reprogramming of mature CD4(+) helper T cells generates distinct MHC class II-restricted cytotoxic T lymphocytes Daniel Mucida, Mohammad Mushtaq Husain, Sawako Muroi, Femke van Wijk, Ryo Shinnakasu, Yoshinori Naoe, Bernardo Sgarbi Reis, Y...